@article{Botting2000,
author = {Botting, B. and Dunnell, K.},
title= {Trends in fertility and contraception in the last quarter of the 20th century},
year = {2000},
URL = {http://www.statistics.gov.uk/articles/population_trends/fertconttrends_pt100.pdf},
journal = {Population Trends},
volume = {100},
}