The twentymile park district of the Yamps coal field, Routt county, Colorado
By: by Marius R. Campbell.
Series: U.S.  Geological survey.  Bulletin 748
Publisher: Govt. Print. Off.
Published: 1923
Place of publication: Washington
Language: eng
Number of pages: 82
Subjects: Coal -- Colorado -- Routt County.
Notes: At head of title: Department of the Interior.
Map folded in pocket.