@article{Sprey1982,
author = {Sprey, J. and Matthews, S.H.},
title= {Contemporary grandparenthood: A systemic transition},
year = {1982},
doi = {10.1177/0002716282464001009},
journal = {Annals of the American Academy of Political and Social Sciences},
volume = {464},
number = {1},
pages = {91--103},
}