APA (7th ed.) Citation

Smithsonian Institution. (1921). Cambrian geology and paleontology, IV: No. 7, Notes on structure of Neolenus. [publisher not identified].

Chicago Style (17th ed.) Citation

Smithsonian Institution. Cambrian Geology and Paleontology, IV: No. 7, Notes on Structure of Neolenus. [Washington]: [publisher not identified], 1921.

MLA (9th ed.) Citation

Smithsonian Institution. Cambrian Geology and Paleontology, IV: No. 7, Notes on Structure of Neolenus. [publisher not identified], 1921.

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