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Separation marks; notes on "The Worst Rapid" in the Grand Canyon

Title: 
Separation marks; notes on "The Worst Rapid" in the Grand Canyon
Author: 
O. D. Marston
Article Date: 
Spring 1976
Language: 
English
Journal Title: 
J Ariz Hist
Journal Volume: 
17
Page Number(s): 
1-20
Rights: 
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