Elsevier,33 Mosby Company,15 Williams & Wilkins,10 Journal Of Pregnancy and Child Health,6 Planta Tree,4 Elsevier4 Jones and Bartlett Publishers,4 egc,3 OXFORD,3 Bailliere Tindal,2 John Wiley & Sons,2 Blackwell Publishing,2 Sauders Company,2 Oxford University Press,2 Churchill Livingstone,2 John Wiley & Sons2 dk books,2 Appleton & Lange,2 Williams & Wilkins2 Golden Book,2