APA
Northwestern University G. (. o., Northwestern University G. (. o., . (1952). Rural land classification program of Puerto Rico. : .
Chicago
Northwestern University Geography (Department of-), Northwestern University Geography (Department of-), . 1952. Rural land classification program of Puerto Rico. : .
Harvard
Northwestern University G. (. o., Northwestern University G. (. o., . (1952). Rural land classification program of Puerto Rico. : .
MLA
Northwestern University Geography (Department of-), Northwestern University Geography (Department of-), . Rural land classification program of Puerto Rico. : . 1952.
