Ordovician-Silurian graptolites from the Ledbetter slate, northeastern Washington State
By: by Claire Carter.
Series: U.S. Geological Survey bulletin -- 1860-B; Shorter contributions to paleontology and stratigraphy
Publisher: U.S. G.P.O.
Published: 1989
Place of publication: [Washington]
Language: eng
Number of pages: 29
Subjects: Graptolites -- Washington (State); Paleontology -- Ordovician.; Paleontology -- Silurian.; Paleontology -- Washington (State) -- Ordovician.; Paleontology -- Washington (State) -- Silurian.
Notes: Includes map on one folded plate in pocket.

Includes bibliographical references (p. 22-24).