Lukas, Johannes. 1970. Stuiden zur Sprache der Gisiga (Nordkamerun). J.J. Augustin.
@book{1624_lukas_gis,
author = {Lukas, Johannes},
publisher = {J.J. Augustin},
title = {Stuiden zur Sprache der Gisiga (Nordkamerun)},
year = {1970}
}