A study on the application of the salivary occult blood test by salivaster to the screening of gingivitis for elementary school children and junior high school students.
1) McCall, J. O.: Gingival and periodontal disease in children, J. Periodont., 9: 7, 1938.
2) Baer, P. N.: Periodontal disease in children and adolescents: a clinical study, J. A. D. A., 55: 629-634, 1957.
3) Sigurd p. Ramfjord, R. P. Emslie, John C. Greene. A. J. Held and Jens Waer Raug: Epidemiological studies of periodontal disease, Am. J. Public Health, 58: 1713, 1968.
4) Stallard, R. E.: Current concepts of periodontal disease, J. Dent. Children, 34: 204, 1967.