Handbook on Sanitation of Buses 1966 : Standards of sanitation for the construction and operation of commercial buses and servicing and catering facilities /

“…U.S.Department of Health, Education, and WelfarePublic Health ServiceDivisión of Environmental Engineering and Food Protection,…”

Water pollution control sewage treatment water treatment : selected biological references / by Ingram, William M

“…U.S.Department of Health, Education, and WelfarePublic Health ServiceDivisión of Water Supply and pollution control,…”

The diagnosis of smallpox / by Ricketts, Thomas Francis

“…U.S Department of Health, Education and Welfare : Public health serviceBureau of disiase prevention and environmental control.División of foreign quarantine,…”

Examination of Foods for Enteropathogenic and Indicator Bacteria : review of Methodology and Manual of Selected Procedures / by Lewis, Keith H

“…U.S.Department of Health, Education, and WelfarePublic Health ServiceDivisión of Environmental Engineering and Food Protection Milk and Food Branch,…”