@article{Smith2015,
author = {Smith, N.R. and Kelly, Y.J. and Nazroo, J.Y.},
title= {Ethnic differences in cognitive development in the first 7 years: Does maternal generational status matter?},
year = {2015},
doi = {10.1136/jech-2015-205864},
volume = {70},
number = {5},
pages = {506--512},
}