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Dunes of the Western Navajo Country
John T. Hack
Geographical Review
Vol. 31, No. 2 (Apr., 1941), pp. 240-263
http://www.jstor.org/stable/2102062
Correspondence: Discussion of "Dunes of the Western Navajo Country"
F. A. Melton
Geographical Review
Vol. 32, No. 3 (Jul., 1942), pp. 524-526
http://www.jstor.org/stable/210411