De l'astronomie et des mathématiques chez les chinois

We guarantee the condition of every book as it's described on the Abebooks web
sites. If you're dissatisfied with your purchase (Incorrect Book/Not as
Described/Damaged) or if the order hasn't arrived, you're eligible for a refund
within 30 days of the estimated delivery date. If you've changed your mind about
a
book that you've ordered, please use the Ask bookseller a question link to
contact
us and we'll respond within 2 business days.