an introduction Pfeiffer, Dirk creator text Chichester, U.K Ames, Iowa Wiley-Blackwell 2010 monographic xiv, 135 p. : ill., maps ; 23 cm Veterinary epidemiology Epidemiologic Methods Animal Diseases 636 WIL 2010 A083 Or. 9781405176941 (pbk. : alk. paper) 1405176946 (pbk. : alk. paper)