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Area research : theory and practice
Steward, Julian Haynes, (1950)
The People of Puerto Rico : a study in social anthropology/ by Julian H[aynes] Steward [u.a.]
Steward, Julian Haynes, (1956)
Perspectives on the American community : a book of readings
Warren, Roland L., (1966)
Estudios económico sobre la venta de platanos en los supermercados 1960-61
Lloréns, Antonio A., (1961)
Factores que influyen en los niveles de vida en Puerto Rico
Belcher, John C., (1969)