The Primate Research Centers Program of the National Institutes of Health.- Human melanoma and leukemia associated antigens defined by nonhuman primate antisera.- Cytogenetics of the squirrel monkey (Saimiri sciureus).- Fetal hormones and their effect on the differentiation of the central nervous system in primates.- Immunology of borreliosis in nonhuman primates.- Teratogenic effects of triamcinolone on the skeletal and lymphoid systems in nonhuman primates.- Tetrahydrocannabinol-induced manifestations of the “marihuana syndrome” in group-living macaques.- Effect of ambient levels of ozone on monkeys.- Response of the nonhuman primate to polychlorinated biphenyl exposure.- Cyclical changes in the sexual skin of female rhesus: relationships to mating behavior and successful artificial insemination.- Endocrine and metabolic responses to cold in baboons.- Immunologic and morphologic effects of vasectomy in the rhesus monkey.