@article{Blake1986,
author = {Blake, J.},
title= {Number of siblings, family background, and the process of educational attainment},
year = {1986},
doi = {10.1080/19485565.1986.9988618},
journal = {Biodemography and Social Biology},
volume = {33},
number = {1-2},
pages = {5--21},
}