Cambrian Geology and Paleontology II: No 7--Cambro-ordovician boundary in British Columbia with description of fossils

Chicago citation style
Walcott, Charles D. Cambrian Geology and Paleontology II: No 7--Cambro-ordovician boundary in British Columbia with description of fossils. 1912. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3ASILSRO_145156&repo=DPLA. (Accessed November 14, 2018.)
APA citation style
Walcott, Charles D, (1912) Cambrian Geology and Paleontology II: No 7--Cambro-ordovician boundary in British Columbia with description of fossils. Retrieved from the Digital Public Library of America, http://collections.si.edu/search/results.htm?q=record_ID%3ASILSRO_145156&repo=DPLA
MLA citation style
Walcott, Charles D. Retrieved from the Digital Public Library of America <http://collections.si.edu/search/results.htm?q=record_ID%3ASILSRO_145156&repo=DPLA>.
Note: These citations are programmatically generated and may be incomplete.