1. Advance report of final natality statistics, 1989,1991
2. The contribution of singletons, twins, and triplets to low birth weight, infant mortality, and handicap in the United States;Luke;J Reprod Med,1992
3. Twin births: influence of maternal weight gain on intrauterine growth and prematurity;Luke;Fed Proc,1987
4. The association between maternal weight gain and the birthweight of twins;Luke;J Mat Fet Med,1992
5. Weight gain patterns during twin gestation;Pederson;J Am Dietet Assoc,1989