@inbook{Hoffman1973,
author = {Hoffman, L.W. and Hoffman, M.L.},
title= {The Value of Children to Parents},
year = {1973},
editor = {Fawcett, J.T. },
booktitle = {Psychological Perspectives on Population},
address = {New York},
publisher = {Basic Books},
pages = {19--76},
}