00474nam a2200133Ia 4500 180412s9999||||xx |||||||||||||| ||und|| 283352655 Ahmadu Bello University Library - Zaria Penrose, L.S. The Biology of Mental Defect by L.S. Penrose with a preface by J.B.S. Haldene London Sidgwick & Jackson 1972 xx, 416p.: ill., diagr., table Include bibliographical references and index Haldane J.B.S. 2629 2629