Reference
- Committee ON Chemical Procedures OF The Occupational Health Section, American Public Health Association, Inc. Methods for Determining Lead in Air and in Biological Materials. New York 19, N.Y. : American Public Health Association, Inc., 1790 Broadway .
- Saltzman , B. E. 1955 . Matched Test Tubes in the Beckman DU Spectrophotometer. . Anal. Chem. , 27 : 1207
- Nelson Kenneth , W. Personal communication
- Elkins , H. B. and Ruotolo , B. P. W. 1953 . Notes on Determination of Lead by Dithizone Method. Part II. Interference from Bismuth and Tin. . Amer. Ind. Hyg. Assoc. Quart. , 14 : 111