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Authors
- Crittenden, C. B., author1
- Geiger, J. C. (Jacob Casson), 1885-1981, author1
- Illinois. Department of Public Health. Division of Industrial Hygiene, author.1
- Indiana. Bureau of Industrial Hygiene, author.1
- Kentucky. Department of Health. Division of Maternal and Child Health, author.1
- Miller, Roslyn C., author1
- Sappington, Emmett E., author1
- Skaggs, Lois, author1
- Welke, Hilda F., author1