Open Access#1
John Wesley Powell : soldier, explorer, scientist
In: http://hdl.handle.net/2027/pst.000058861233
"U.S. Government Printing Office: 1980-311-348/44"--P. [24]. ; Includes bibliographical references (page 23). ; Mode of access: Internet.
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In: http://hdl.handle.net/2027/pst.000058861233
"U.S. Government Printing Office: 1980-311-348/44"--P. [24]. ; Includes bibliographical references (page 23). ; Mode of access: Internet.
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In: US Geological Survey circular 1050