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