Birds are flying /

Easy-to-understand text explains the mechanics of bird flight.

Bibliographic Details
Main Author: Kaufmann, John
Format: Book
Language:English
Published: New York : Crowell, [1979]
Edition:1st ed.
Series:Let's-read-and-find-out science books.
Subjects:
Description
Summary:Easy-to-understand text explains the mechanics of bird flight.
Physical Description:34 pages : illustrations (some color) ; 21 x 23 cm.
ISBN:0690039417 :
0690039425 (lib. bdg.) :