Agricultural laborers - United States.

Working poor = farmworkers in the United States / by: (Language materials, printed)

Children for hire = the perils of child labor in the United States / by: (Language materials, printed)

Industrial safety- United States.

Working class- Education- United States.

Migrant agricultural laborers- United States.

Children- Health and hygiene- United States.

Agricultural laborers- United States.

Child labor- United States.

Youth- Employment- United States.

Youth- Health and hygiene- United States.