00666cam a22002531 4500 med48000058 DLC 20260227111609.0 750905s1948 mou b 000 0 eng c med48000058 (OCoLC)1601723 U.S. Army Medical Libr. FM DLC premarc RK60 .C63 1948 617.6069 Covington, Ethel, 1897- The efficient dental assistant. 2d ed. St. Louis, Mosby, 1948. 285 p. 20 cm. Bibliography: p. 277-278. Dentistry Practice. Dental assistant. 38841 38841