Blood, Douglas Charles. Veterinary medicine a textbook of the diseases of cattle sheep, pigs, goats and horses - 7 ed. - London : Bailliere Tindall, 1989 - 1502 p. 37-98 LCCN: 624 Subjects--Topical Terms: Ganado--Enfermedades.Veterinaria. Dewey Class. No.: 636.0896 / B5 1989