Anthracite-Crested butte folio, Colorado
by Samuel Franklin Emmons, Whitman Cross, George Homans Eldridge, Geological Survey (U.S.)
GeologyMaps
Writing a summary for young readers…
For young readers
Book data: Open Library
by Samuel Franklin Emmons, Whitman Cross, George Homans Eldridge, Geological Survey (U.S.)
Book data: Open Library