@article{Stevenson1920,
author = {Stevenson, T.H.C.},
title= {The fertility of various social classes in England and Wales from the middle of the nineteenth century to 1911},
year = {1920},
doi = {10.2307/2340958},
journal = {Journal of the Royal Statistical Society },
volume = {83},
number = {3},
pages = {401444},
}