@article{doi:10.1001/archpedi.1949.02030050703005,
author = {SANFORD HN and KOSTALIK M and BLACKMORE B},
title = {PRothrombin studies on the blood of the premature infant and the value of vitamin k therapy},
journal = {American Journal of Diseases of Children},
volume = {78},
number = {5},
pages = {686-693},
year = {1949},
doi = {10.1001/archpedi.1949.02030050703005},
URL = { + http://dx.doi.org/10.1001/archpedi.1949.02030050703005},
eprint = {/data/Journals/PEDS/24070/archpedi_78_5_005.pdf}
}