Clinical radiology of exotic companion mammals, 2008: ECIP t.p. (William R. Widmer, DVM, MS, Dipl ACVR; prof. of diagnostic imaging, Dept. of Veterinary Clinical Sciences, Sch. of Veterinary Med., Purdue Univ., Lafayette, IN)

Textbook of veterinary diagnostic radiology, 2018, ©2018: pages vii and 2 (William R. Widmer, DVM, MS, DAVCR, Professor Emeritus, Radiology, Department of Veterinary Medicine, Purdue University, West Lafayette, Indiana)