The Psychology of Birds By Harold E. Burtt PhD. An interpretation of Birds behavior. Copyright 1967 Its an offically withdrawn old library book, No missing pages, Dust jacket is in great condition ... Number of pages 242 *Please be aware that when you purchase vintage items, you are purchasing something that was pre-owned. Some vintage items may show some signs of wear/use, any visible defects WILL BE noted in description* Thank you for viewing my closet. ♡