Pp. (vol. 1): xvi, 820; (vol. 2A): x, (1), 633; (vol. 2B): ix, 296; (vol. 3): xii, 497; (vol. 4): xiii, 769; numerous text-figures (black-and-white photos, maps, line-drawings, and other illustrations), 2 phonograph records (33 1/3 rpm) of gibbon songs in pocket at rear of volume 1. Publisher's original two-color laminated boards (hardcover), lettered on the spine and front cover of each volume, thick sm 4to. The five volumes are Volume 1: Systematics, Evolution and Anatomy; Volume 2, Part Behavior, Conservation and Ecology; Volume 2, Part Behavior, Cognition, and Motivation; Volume 3: Reproduction and Development; and Volume 4: Neurosciences. This is the complete set of this massive work on the comparative biology of the Primates. Over 100 researchers contributed to the 80 chapters that make up these five large tomes. This set is seldom found in a complete state as offered here. Small signature on the front endpaper of volume 1 only; no other ownership marks or signs of use.