@article{Freedman1988,
author = {Freedman, D. and Thornton, A. and Camburn, D. and Alwin, D. and Young-DeMarco, L.},
title= {The life history calendar: A technique for collecting retrospective data},
year = {1988},
doi = {10.2307/271044},
journal = {Sociological Methodology},
volume = {18},
pages = {37--68},
}