Guano tramway in Granite Gorge
Author
R. O. Greenwalt
Article Date
January 1958
Journal Title
Des
CABLEWAYS
Guano from Grand Canyon
Article Date
June 1957
Journal Title
Ariz Engr Scientist
Canyon cable to riches
Author
B. DeWald
Article Date
January 12, 1958
Article Abstract
2-mile tram hauls ancient guano from Grand Canyon cave
Journal Title
Ariz Days & Ways
Bat Cave bonanza
Author
A. Hamilton
Article Date
January 1958
Article Abstract
An aerial cableway brings out bat guano from a formerly inaccessible deposit in the Grand Canyon
Journal Title
Westways