Fixing it for heredity
Raymond Fancher, 9 November 1989
“... own first report, and that remains a classic today. At Chicago in the Thirties, Horatio Newman, Frank Freeman and Karl Holzinger laboriously collected a sample of 19 separated twin pairs, and reported detailed findings in their 1937 book, Twins: A Study of Heredity and Environment. This study used several pioneering tests and techniques that have long since ... ”