Publicado por Vicerrector, 1976
Librería: Marbus Farm Books, Winchester, VA, Estados Unidos de America
Paperback. Condición: Good. Spiral bound softcover with clear plastic wraps. Text is photocopied - whether the original was published as photocopies I don't know. Some of the charts and tables are difficult to read because of the quality of the copying. Owner's name on title page. Front cover has small tear, contents clean and tight. 128 pages, bibliograhy.