@inbook{Ryder1986,
author = {Ryder, N.B.},
title= {The cohort as a concept in the study of social change},
year = {1986},
doi = {10.1007/978-1-4613-8536-3_2},
editor = {Mason, W.M.},
editor = {Fienberg, S.E.},
booktitle = {Cohort analysis in social research: Beyond the identification problem},
address = {New York, NY},
publisher = {Springer},
pages = {9--44},
}