Ordovician and Silurian graptolite succession in the Trail Creek area, central Idaho:  a graptolite zone reference section.  by Claire Carter and Michael Churkin Jr.
Contributors: Churkin, M., Jr.
Publisher: U.S. Dept. of the Interior
Place of publication: Washington
Language: eng
Number of pages: 37
Subjects: Graptolites
Notes: 11