A method of imputing length of gestation on birth certificates /

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Main Author: Taffel, Selma
Corporate Author: National Center for Health Statistics (U.S.)
Other Authors: Johnson, David P.
Heuser, Robert L.
Format: Book
Series:Vital and health statistics. Series 2, Data evaluation and methods research. no. 93
DHHS publication ; no. (PHS) 82-1367
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