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Vital and health statistics - Series 20 - Data from the national vital statistics system / National Center for Health Statistics (U.S.).-- (1965) -.-- Hyattsville ISSN 0083-2022

 
Texto Completo Gratuito - Livre acesso
URL http://www.cdc.gov/nchs/products/pubs/pubd/series/sr20/ser20.htm