1. Preliminary industrial hygiene survey of Indiana industries Author(s): Indiana. Bureau of Industrial Hygiene, author. Publication: Indianapolis, Indiana : Indiana State Board of Health, 1939 Subject(s): Occupational HealthHealth SurveysIndiana
2. Industrial survey of the state of Ohio: evaluation of industrial hygiene problems Author(s): Ohio. Department of Health. Adult Hygiene Division, author. Publication: Columbus, Ohio : Ohio Department of Health, 1940 Subject(s): Occupational HealthOccupational Health ServicesPublic HealthOhio
3. Evaluation of the industrial hygiene problem of the State of Colorado Publication: Denver, Colorado : State of Colorado Board of Health, 1939 Subject(s): Occupational Exposure -- statistics & numerical dataOccupational Health
