@article{Derrick2006,
author = {Derrick, V.P.A.},
title= {Observations on (1) errors of age in the population statistics of England and Wales, and (2) the changes in mortality indicated by the national records},
year = {2006},
doi = {10.1017/S0020268100031474},
volume = {58},
number = {2},
pages = {117--159},
}