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DAVIS K, 1948, INT APPROACHES PROBL, P60
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DAVIS K, 1946, URBANIZATION LATIN A, P3
[4]
*DEP AGR COMM BUR, 1948, ANN BOOK STAT PUERT, P8
[5]
JANER JL, 1945, HUM BIOL, V17, P281
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*NAT CTR HLTH STAT, 1945, VIT STAT US 1943
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*NAT OFF VIT STAT, 1949, VIT STAT SPEC REP NA, V31, P204
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PERLOFF HS, 1950, PUERTO RICOS EC FUTU, P161
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PERLOFF HS, 1950, PUERTO RICOS EC FU 3
[10]
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