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