APA Citation

Marshall, W. B., & Bowles, E. O. (1932). New Fossil Fresh-Water Mollusks from Ecuador. Washington: United States National Museum.

Chicago Style Citation

Marshall, William B., and Edgar O. Bowles. New Fossil Fresh-Water Mollusks From Ecuador. Washington: United States National Museum, 1932.

MLA Citation

Marshall, William B., and Edgar O. Bowles. New Fossil Fresh-Water Mollusks From Ecuador. Washington: United States National Museum, 1932.

Warning: These citations may not always be 100% accurate.