@article{doi:10.1001/jama.1989.03430010117047,
author = {Schewitz LJ},
title = {PRinciples of obstetrics},
journal = {JAMA},
volume = {262},
number = {1},
pages = {105-106},
year = {1989},
doi = {10.1001/jama.1989.03430010117047},
URL = { + http://dx.doi.org/10.1001/jama.1989.03430010117047},
eprint = {/data/Journals/JAMA/9173/jama_262_1_047.pdf}
}