@article{McNeil1977,
author = {McNeil, D.R. and Trussell, T.J. and Turner, J.C.},
title= {Spline interpolation of demographic data},
year = {1977},
doi = {10.2307/2060581},
journal = {Demography},
volume = {14},
number = {2},
pages = {245--252},
}