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040 _aISI Library
_bEnglish
_cISI Library
110 _aUnited States.
_bDept. of Health, Education, and Welfare. Public Health Service
245 _aFertility and educational attainment:
_bPuerto Rico - 1962
260 _aWashington, D.C.:
_bNational Center for Health Statistics,
_c1967
490 _aVital and Health Statistics
_v21-12
650 _aAdministrative Report
942 _2ddc
_cRP
999 _c435210
_d435210