Bibliographic index of American Ordovician and Silurian fossils /
by Ray S. Bassler.
APA Citation
Bassler, R. S. (Ray Smith)., Smithsonian Institution. (1915). Bibliographic index of American Ordovician and Silurian fossils. Washington: Govt. Print. Off..
MLA Citation
Bassler, Ray S. (Ray Smith), b. 1878, and Smithsonian Institution. Bibliographic Index of American Ordovician And Silurian Fossils. Washington: Govt. Print. Off., 1915.
Warning: These citations may not always be complete (especially for serials).