Wentworth, Edward N. 1887-1959. Progressive hog raising. By Edward N. Wentworth. Assisted by E. R. Gentry. - Chicago, Armour's bureau of agricultural research and economics, 1922. - 88 p. front., plates (1 col. and double) map, diagrs. 17 cm. Frontispiece and plates printed on both sides. LCCN: agr23000072 Subjects--Topical Terms: Swine. LC Class. No.: SF395 / .W4 National Agricultural Library Call No.: 46 / W48