Pp. xxiv, 980; numerous text-figures (charts, graphs and some photos). Publisher's original orange cloth, lettered in gilt on the spine, blue pictorial dust jacket, thick sm 4to. The papers in this volume are based on the papers presented at four symposia at the Sixth Congress of the International Society held at the University of Cambridge in August, 1976. The volume contains 150 different papers divided into nine sections. This mammoth work that presents a cross-section of the primate behavioral research as it was known in the 1970s. No ownership marks and no signs of use.