@Book{320688461,
author="Wellan, Johan Willem Jules
and Helfrich, O. L.",
title="Loopende tot het einde van 1915",
series="Zuid-Sumatra",
year="1923",
address="'s-Gravenhage",
note="Massenents{\"a}uert 2009 pdager DE-18",
language="Dutch"
}