著者
Cannery & Agricultural Workers Industrial Union
2
Southern Tenant Farmers' Union
2
United Cannery, Agricultural, Packing, and Allied Workers of America
2
AFL-CIO
1
Migratory Agricultural Worker's Union
1
National Agricultural Workers Union
1
National Farm Labor Union (U.S.)
1
National Farm Workers Association
1
United Farm Workers
1
United Farm Workers Organizing Committee
1
United Farm Workers of America
1