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181   $ctxt$2rdacontent
182   $cc$2rdamedia
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200 12$aA method of imputing length of gestation on birth certificates /$fby Selma Taffel, David Johnson, and Robert Heuser
210  1$aHyattsville, Md. :$cU.S. Department of Health and Human Services, Public Health Services, Office of Health Research, Statistics, and Technology, National Center for Health Statistics,$d1982.
215   $a1 online resource (iv, 11 pages) $cillustrations
225 1 $aVital & health statistics. Series 2, Data evaluation and methods research ;$vno. 93
225 1 $aDHHS publications ;$vno. (PHS) 82-1367
300   $a"May 1982."
606   $aConception$xDate of
606   $aPregnancy$xDuration$zUnited States$vStatistics
606   $aBirth certificates$zUnited States
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607   $aUnited States$2fast
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615  0$aConception$xDate of.
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615  0$aBirth certificates
615  7$aConception$xDate of.
615  7$aPregnancy$xDuration.
700   $aTaffel$b Selma$01413854
702   $aJohnson$b David P.
702   $aHeuser$b Robert L.
712 02$aNational Center for Health Statistics (U.S.),
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996   $aA method of imputing length of gestation on birth certificates$93511328
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