1. Time and Motion Study in Dentistry;Hoffman;Bull. Greater Milwaukee Dent. Assoc.,1957
2. Motion Study;Gilbreth,1911
3. Motion and Time Study in Dentistry;Mundel;J. Am. Dent. Assoc.,1958
4. The Selection and Use of Operator's Stools and Contour Chairs;Anderson;Dent. Clin. North Am.,1965
5. University of Washington lecture;Klenda,1962