@article {Umbgrove1940,
	title = {Madreporaria from the Togian reefs (Gulf of Tomini, North-Celebes)},
	journal = {Zoologische Mededelingen Leiden},
	volume = {22},
	number = {10},
	year = {1940},
	pages = {265{\textendash}310},
	url = {http://www.repository.naturalis.nl/record/318138},
	author = {Umbgrove, J H F}
}
@inbook {Simons1940,
	title = {Geological investigations in north-east Netherlands Timor},
	booktitle = {Geological Expedition to the Lesser Sunda Islands under the Leadership of H.A. Brouwer},
	volume = {1},
	year = {1940},
	pages = {107{\textendash}213},
	publisher = {University of Amsterdam},
	organization = {University of Amsterdam},
	address = {Amsterdam},
	keywords = {JS, TIP},
	author = {Simons, A L}
}
@article {Kuhn1940,
	title = {Zur Kenntnis des Rhät von Vorarlberg},
	journal = {Mitteilungen des Alpenl{\"a}ndischen Geologischen Vereines},
	volume = {33},
	year = {1940},
	pages = {111{\textendash}157, pl. 1{\textendash}2},
	keywords = {ER, TIP},
	url = {http://www.geol-ges.at/mitteilungen/mitt-33.html},
	author = {K{\"u}hn, Othmar}
}
