000 00546nam a22001457a 4500
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040 _aISI Library
_bEnglish
_cISI Library
110 _aUnited States.
_bDept. of Health, Education, and Welfare. Public Health Service
245 _aSeasonal variation of births:
_bUnited States, 1933-63
260 _aWashington, D.C.:
_bNational Center for Health Statistics,
_c1966
490 _aVital and Health Statistics
_v21-9
650 _aAdministrative Report
942 _2ddc
_cRP
999 _c435207
_d435207