@article{Baird1986,
author = {Baird, D.D. and Wilcox, A.J. and Weinberg, C.R.},
title= {Use of time to pregnancy to study environmental exposures},
year = {1986},
doi = {10.1093/oxfordjournals.aje.a114417},
volume = {124},
number = {3},
pages = {470--480},
}