Widmer, Jack. Practical beef production, by Jack Widmer, with photographs by Barbey Seligman and Jack Widmer. - New York, C. Scribner's sons [1946] - xvii, 93, [8] p. illus. 24 x 21 cm. LCCN: agr46000231 Subjects--Topical Terms: Cattle. LC Class. No.: SF207 / .W47 Dewey Class. No.: 636.213