|| Original offprints, reprints. Contains the following: Genetic polymorphism, 1966, inscribed signed by Ford to "Arthur" Cain; Evolution in Progress, nd, stapled rusty, Polymorphism, 1945; The Genetics of Polymorphism in the Lepidoptera, 1953; The Experimental Study of Evolution, 1953; A Uniform Notation for the Human Blood Groups, 1955; A discussion on the dynamics of natural populations, 1956; Polymorphism in Plants, Animals and Man, 1957. Very good. * Ford was a British ecological geneticist. Cain a British evolutionary biologist.