African Americans - Health and hygiene - History.

Water, race, and disease by: (Language materials, printed)

Health and race- History.- United States

Waterborne infection- Prevention- United States

Sanitary Engineering- history- United States.

Communicable Diseases- ethnology- United States.

African Americans- Social conditions

African Americans- United States.

African Americans- Health and hygiene

Water Pollution- adverse effects- United States.