written by David Murdoch ; chief consultant, Stanley A. Freed ; photographed by Lynton GardinerDK Pub. Inc. in association with the American Museum of Natural History2005
[Text by Pamela Soeder, with contributions by Pam Creasy and Yosta Boots ; illustrations by Bill Powless with Linda Witt Fries ; edited by Laura Beattie and Louise Craft]Carnegie Museum of Naural Historyc1998