Genetics & human heredity / [by] J. Ben Hill [and] Helen D. Hill. Hill, J. Ben (John Ben), 1879-1961. Miller, Helen Hill, 1899- joint author. Genetics. Heredity, Human. QH431 .H49 591.15 HIG Includes Idex & Bibliography. New York, McGraw-Hill [1955] [1955] 1955 Text 526 p. : eng