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1by Medina, Alvin L.Subjects: “...Rangelands Research Arizona Bibliography....”
Published 1996
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2by Spamer, Earle E.Subjects: “...Fossils Arizona Grand Canyon Region Bibliography....”
Published 1992
Microform Book -
3by Spamer, Earle E.Subjects: “...Geology Arizona Grand Canyon Bibliography....”
Published 1983
Microform Book -
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19Published 1987Government Document Microform Book
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