W h bergtold (53 resultados)

Condición: New.

Condición: As New. Unread book in perfect condition.

Pamphlet. Condición: Very Good. Vol 45, April, 1928, pp. 170-176, Extracted from orig vol, begins with title page, stapled & trimmed, thus is like a pamphlet, VG.

Condición: New.

Condición: New.

Condición: New.

Condición: New.

Softcover. Condición: Very Good. Off Print. Reprinted from The Wilson Bulletin No. 100, September, 1917, pp. 113-129. Original paper covers. Covers have faded margins.

Pamphlet. Condición: Very good. 1st Edition. (1917). Pages 113 - 129. From the Wilson bulletin, no. 100, September, 1917. Former owner's stamp on front cover. Very good, wrappers. (091).

PAP. Condición: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condición: New. New Book. Shipped from UK. Established seller since 2000.

Condición: New. In English.

Soft cover. Condición: Fair. A G 8vo paperback monograph. No bibliographic information beyond the title and author is stated but on information and belief, the material is from the Wilson Ornithological Society's Wilson Bulletin No. 100 (1917). Age-tanned and with a significant amount of brief penciled marginalia, but still fully legible, complete, and securely bound.…

Condición: New.

Condición: New. In English.

PF. Condición: New.

HRD. Condición: New. New Book. Shipped from UK. Established seller since 2000.

Condición: As New. Unread book in perfect condition.

HRD. Condición: New. New Book. Shipped from UK. Established seller since 2000.

Condición: New. In English.

Hardcover. Condición: Very Good. No Dust Jacket. First Edition. A clean, tight copy of this scholarly monograph, with no markings in the text whatever. It was withdrawn from a museum library, but signs of this are minimal. The author has inscribed the first page. The pages are lightly age-toned, but not brittle.; Ex-library; Author Signed by Author.…

Condición: New.

Hardcover. Condición: Very Good. 109pp., green cloth with gilt printing to spine. Cover edges and spine are sunned/toned. Contents are bright and complete. Near Very Good.

Condición: New. Print on Demand.

Taschenbuch. Condición: Neu. Neuware.

Taschenbuch. Condición: Neu. Neuware.

hardcover. Condición: Good. This is a group of various ornithology studies from the late 19th and early 20th centuries bound together as a hardcover volume. Studies are from the states listed on spine. No DJ or publisher listed. Stamp mark on inside of front cover. Publication date of latest study is 1919. Includes a signed letter by one of the authors, Robert Wilcott. Book shows common (average) signs of wear and use. Binding is still tight. Covers are intact but may be repaired. We have 75,000 books to choose from -- Ship within 24 hours -- Satisfaction Guaranteed.…

Paperback. Condición: New. Print on Demand. This book explores the hidden world of bird incubation periods. For the first time, the author has compiled a list of incubation periods for 625 species and subspecies, offering a wealth of data for ornithologists, biologists, and bird enthusiasts alike. The book examines various theories proposed to explain the factors governing the length of incubation, including the size of the bird, the age of the female, and the precocity of the young. The author also delves into the effects of external factors, such as temperature and nest site, on incubation duration. This book is a valuable resource for anyone interested in the fascinating process of bird reproduction. It provides a comprehensive understanding of the factors that influence incubation periods and sheds light on the evolutionary adaptations that have shaped this crucial stage in the life cycle of birds. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item. …

Condición: New. PRINT ON DEMAND.

Buch. Condición: Neu. Neuware - In this groundbreaking scientific study, W.H. Bergtold offers a comprehensive analysis of the incubation periods of a wide variety of bird species. Drawing on data collected over many years of research, Bergtold provides a detailed account of how different factors-such as temperature, humidity, and nesting habits-can affect the length of an egg's incubation period. The book also includes many fascinating observations about the behavior and physiology of various bird species, and offers insights into the evolutionary processes that have shaped their reproductive biology. This is an essential resource for anyone interested in avian biology, or in the broader field of evolutionary biology.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the 'public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.…