*The Land and Wildlife of Tropical Asia (1964), by S. Dillon Ripley
*The Land and Wildlife of Eurasia (1964; revised 1967), by François Bourlière
*The Land and Wildlife of Australia (1964; revised 1967), by David Bergamini
*Early Man (1965; revised 1968), by F. Clark Howell
*Animal Behavior (1965), by Niko Tinbergen