@article {Umbgrove1924,
	title = {Report on Plistocene and Pliocene corals from Ceram},
	journal = {Geological, Petrographical and Palaeontological Results of Explorations, Carried out from September 1917 till June 1919 in the Island of Ceram by L. Rutten and W. Hotz.},
	volume = {1-22},
	number = {Second Series: Palaeontology},
	year = {1924},
	url = {http://sdrv.ms/17GNkjo},
	author = {Umbgrove, J H F}
}
@book {Hickson1924,
	title = {An Introduction to the Study of Recent Corals},
	year = {1924},
	pages = {257},
	publisher = {Manchester University Press},
	organization = {Manchester University Press},
	address = {Manchester},
	author = {Hickson, Sydney J}
}
@article {Fritzsche1924,
	title = {Neue Kreidefaunen aus S{\"u}damerika (Chile, Bolivia, Peru, Columbia)},
	journal = {Neues Jahrbuch f{\"u}r Mineralogie, Geologie und Pal{\"a}ontologie, Abhandlungen},
	volume = {50},
	year = {1924},
	pages = {313{\textendash}334},
	keywords = {JS, RCBS, TIP},
	author = {Fritzsche, C H}
}
