Smithsonian Institution. (1939). Contributions to biology of Philippine Archipelago and adjacent regions: Papers on Philippine diatoms, annelids, hydroids, echinoids, and mollusks [index]. [s.n.].
Chicago Style (17th ed.) CitationSmithsonian Institution. Contributions to Biology of Philippine Archipelago and Adjacent Regions: Papers on Philippine Diatoms, Annelids, Hydroids, Echinoids, and Mollusks [index]. [Washington]: [s.n.], 1939.
MLA (9th ed.) CitationSmithsonian Institution. Contributions to Biology of Philippine Archipelago and Adjacent Regions: Papers on Philippine Diatoms, Annelids, Hydroids, Echinoids, and Mollusks [index]. [s.n.], 1939.
Warning: These citations may not always be 100% accurate.