Columbia subject headings:
Harvard subject headings:
Foreign workers, Mexican--California, Northern.
Mexican American agricultural laborers--California, Northern--Economic conditions.
Mexican American agricultural laborers--Employment--California, Northern.
Mexicans--California, Northern--Economic conditions.
Mexicans--Employment--California, Northern.
Princeton subject headings:
Foreign workers, Mexican--California, Northern.
Mexican American agricultural laborers--California, Northern--Economic conditions.
Mexican American agricultural laborers--Employment--California, Northern.
Mexicans--California, Northern--Economic conditions.
Mexicans--Employment--California, Northern.