by Marius R. Campbell
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Contributions to the geography of the Un...
Historical review of theories advanced b...
Geology of the Big Stone Gap coal field ...
Meaning of meanders in tidal streams
Drainage modifications and their interpr...
The Glacier National Park
Cinders & smoke
Narrow gauge to Silverton
Rebel of the Rockies
Rio Grande Secret Places
Saving the Cumbres & Toltec Scenic Railr...
Rio Grande: In Color