Buchanan, R.E., and Fulmar, E.I.: Physiology and Biochemistry of Bacteria, Baltimore, 1928, Williams & Wilkins Company, vol. 1, p. 137 ; vol. III, p. 195.
2.
Huddleaton, F., and Winter, O.B.: Magnesium Ammonium Phosphate Crystals in Aerobic. Cultures of Brucella Abortus , J. Infect. Dis. 40: 476, 1927.
3.
Naeslund, C.: A Comparative Study of the Formation of Concretions in the Oral Cavity and in the Salivary Glands and Ducts, D. Cosmos88: 1137, 1926.
4.
Maeslund, C.: Studies of Tarter Formation, Acta Path, et microbiol Scandinav . 3: 637, 1926.
5.
Rosebury, T., and Karshan, M.: Salivary Calculus, Chap. VII., in S. M. Gordon's Dental Science, and Dental Art, Philadelphia, 1038, Lea & Febiger.
6.
Scudder, S.A.: Crystal Formation in Bacterial Cultures, J. Bact. 11: 90, 1926.
7.
Tenenbaum, B., and Karshan, M.: The Composition and Formation of Salivary Calculus, J. Periodont . 16: 72, 1944.
