References
- Feigl , Fritz . 1950 . Chemistry of Specific Selective and Sensitive Reactions , New York : Academic Press, Inc. .
- Amdur Mary , O. and Silverman , Leslie . 1954 . Direct Field Determination of Lead in Air. . AMA Arch. Ind. Hyg. & Occ. Med. , 10 Aug. : 152
- McConnaughey Paul , W. April 24 1958 . Field Type Colorimetric Testers for Gases and Particulate Matter April 24 , Atlantic City, New Jersey Mine Safety Appliances Company, presented before the annual meeting of the American Industrial Hygiene Association
- Silverman , Leslie . 1944 . A Welding Fume Sampler. . J. Ind. Hyg. & Tox. , 26 Nov. : 316
- Feigl , Fritz . 1955 . Spot Test , New York : Elsevier Publishing Company .
- McCarthy , J. H. Jr. and Stevens , R. E. 1958 . Apparatus and Techniques for Multiple Tests by the Confined-Spot Method of Colorimetric Analysis. . Anal. Chem. , 30 April : 535
- Yagoda , Herman . 1937 . Applications of Confined Spot Tests in Analytical Chemistry. . Ind. & Eng. Chem., Anal. Ed. , 9 Jan. : 79