Authors: J P Crane; M L LeFevre; R C Winborn; J K Evans; B G Ewigman; R P Bain; F D Frigoletto; D McNellis Journal: Am J Obstet Gynecol Date: 1994-08 Impact factor: 8.661
Authors: Joyce A Martin; Brady E Hamilton; Paul D Sutton; Stephanie J Ventura; Fay Menacker; Martha L Munson Journal: Natl Vital Stat Rep Date: 2003-12-17