(1940). Optical projection as an aid in studying plane spiral coiling of small fossil lamellibranchs. [s.l.]: [s.n.].
Chicago Style CitationOptical Projection As an Aid in Studying Plane Spiral Coiling of Small Fossil Lamellibranchs. [s.l.]: [s.n.], 1940.
MLA CitationOptical Projection As an Aid in Studying Plane Spiral Coiling of Small Fossil Lamellibranchs. [s.l.]: [s.n.], 1940.
Warning: These citations may not always be 100% accurate.