@article{Grabill1965,
author = {Grabill, WilsonR and Cho, LeeJay},
title= {Methodology for the Measurement of Current Fertility From Population Data on Young Children},
year = {1965},
doi = {10.2307/2060106},
journal = {Demography},
volume = {2},
number = {1},
pages = {50--73},
}