@book{Calot1998,
author = {Calot, G. and Confesson, A. and Sardon, J.P. and Baranzini, E. and Cotter, S. and Wanner, P.},
title= {Two centuries of Swiss demographic history: Graphic album of the 1860–2050 period},
year = {1998},
address = {Neuenburg},
publisher = {Swiss Federal Statistical Office},
}