@article {777,
	title = {A conchological expedition to Cuba},
	journal = {Proceedings of the Pennsylvania Academy of Science},
	volume = {7},
	year = {1933},
	pages = {167-172},
	author = {Richards, H. G.}
}
@article {564,
	title = {Surinamia, a new apullariid from Dutch Guiana},
	journal = {The Nautilus},
	volume = {47},
	year = {1933},
	pages = {71-72},
	author = {Clench, W. J.}
}
@article {749,
	title = {Zoological results of the Matto Grosso expedition to Brazil in 1931,{\textemdash}II. Mollusca},
	journal = {Proceedings of the Academy of Natural Sciences of Philadelphia},
	volume = {85},
	year = {1933},
	pages = {67-76, pl. 2},
	author = {Pilsbry, H. A.}
}
