The genus Pentacrinus in Alaska
By: by Frank Springer ...
Series: [Geological pamphlets. Paleontology -- no. 939]; [Geological pamphlets -- no. 939]
Publisher: Govt. print. off.
Published: 1925
Place of publication: Washington
Language: eng
Subjects: Pentacrinus
Notes: Cover-title.

Proceedings of the United States National museum, vol. 67, art. 5, pp. 1-7, pl. 1.