@book{circref2514,
title = {Effective care in pregnancy and childbirth},
booktitle = {Series: Oxford medical publications.},
author = {Chalmers, Iain., Enkin, Murray., Keirse, Marc J. N. C. },
publisher = {Oxford Medical Publications},
year = {1989},
address = {Oxford ; New York},
url = {},
keywords = {Childbirth, Labor, Prenatal care}
}