Bryozoa of the Canal zone and related areas.
By Ferdinand Canu ... and Ray S. Bassler.
- Washington, Govt. print. off., 1918.
- 117-122 p. 24 cm.
- Smithsonian institution. United States National museum. Bulletin 103 [pt.6] .
- United States National Museum. Bulletin ; 103, pt.6. .
At head of title: Contributions to the geology and paleontology of the Canal zone, Panama, and geologically related areas in Central America and the West Indies. "Extract from Bulletin 103, pages 117-122, with plate 53."