@article{MacMahon1973,
author = {MacMahon, B. and Cole, P. and Brown, J.},
title= {Etiology of human breast cancer: A review},
year = {1973},
doi = {10.1093/jnci/50.1.21},
journal = {Journal of the National Cancer Institute},
volume = {50},
number = {1},
pages = {21‒42},
}