TY - JOUR A1 - Blakley, G. A. T1 - Vaginal cytologie and luteinizing hormone levels in the Pongo pygmaeus (Orang-utan) JF - C. R. Carpenter (Ed.) Recent Advances in Primatology, New York and Basel (S. Karger) 1969, pp. 22-30. Y1 - 1969 ER -