1. Advance report of final maternity statistics, 1987;National Center for Statistics;Monthly Vital Star Rep.,1989
2. Preventing Low Birthweight;Committee to Study the Prevention of Low Birthweight,1985
3. Factors associated with low birthweight. United States, 1976;National Center for Health Statistics;Vital Health Star. [21],1980
4. Determinants of low birth weight: Methodological assessment and metaanalysis;Kramer;Bull WHO,1987
5. Birth weights among infants born to adolescent and young adult women;Horon;Am J Obstet Gynecol.,1983