1. Adrian, George W. 1967. Principal Sanitary Engineer, Department of Water and Power, The City of Los Angeles, Personal Communication.
2. Crystallographic and chemical relations between octacalcium phosphate and hydroxyapatite;Brown;Nature,1962
3. The mineralogical composition of the calcareous corpuscles of Taenia taeniaeformis;Scott;Experimental Parasitology,1962
4. Index (Inorganic) to the Powder Diffraction File,1964
5. Tatone, Ron. 1968. City Engineer, Bureau of Water Works, City of Portland, Personal Communication.