Opisthoporus penangensis Stoliczka, 1872

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Authors	Title	Year of Publication
S.Y. Chan	A brief collecting trip to Perak, West Malaysia. part one.	1998
S.Y. Chan	A brief collecting trip to Perak, West Malaysia. part two	1998
F.F. Laidlaw	A list of the land and fresh-water Mollusca of the Malay peninsula with notes	1928
E.R. Sykes	On the land operculate Mollusca collected during the "Skeat Expedition" to the Malay Peninsula in 1899-1900	1903
W. Kobelt	Cyclophoridae	1902
J.E. Tenison-Woods	Malaysian land and freshwater Mollusca	1888
O. von Moellendorff	The landshells of Perak	1886
H. Crosse	Mollusques nouveaux de perak (Indo-Chine)	1879
G. Nevill	part I Gastropoda : Pulmonata and Prosobranchia-Neurobranchia	1878
L. Pfeiffer	Monographia pneumonopomorum viventium ... auctore Ludovico Pfeiffer. Supplementum tertium monographiae auriculaceorum, parte secunda auctum /	1876