Radentz, William H. The Etiology of periodontal disease and the periodontal examination [videorecording] / by William H. Radentz - Chapel Hill, NC. Health Sciences Consortium 1990 - 1 videocassette (VHS) (20 min.) : sd., col. ; 1/2 in. + 1 guidebook (30 p. ; 22 cm.) ISBN: RM305.80 Subjects--Topical Terms: Periodontal diseases--EtiologyPeriodontal Diseases--diagnosis National Library of Medicine Call No.: WU240 / .R127e 1990 9