%0 Journal Article %T SEASONALITY OF PRETERM BIRTH IN THE COLLABORATIVE PERINATAL PROJECT: DEMOGRAPHIC FACTORS %A COOPERSTOCK, MICHAEL %A WOLFE, ROBERT A. %J American Journal of Epidemiology %V 124 %N 2 %P 234-241 %@ 0002-9262 %D 1986-08-01 %I Oxford University Press %~ DeepDyve