[1]
Chapman, S.N., Lahdenperä, M., Pettay, J.E. and Lummaa, V. 2017. Changes in Length of Grandparenthood in Finland 1790-1959. Finnish Yearbook of Population Research. 52, (Dec. 2017), 3–13. DOI:https://doi.org/10.23979/fypr.65346.