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2Published 1977“...[National Park Service],...”
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3Published 2003“...National Park Service,...”
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4by Krausman, Paul R., 1946-“...U.S. Dept. of the Interior, National Park Service :...”
Published 1981
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5by Bissonette, John A.“...U.S. Dept. of the Interior, National Park Service,...”
Published 1982
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6Published 2004“...U.S. Dept. of the Interior, National Park Service,...”
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7by Mallouf, Robert J.“...Center for Big Bend Studies, Sul Ross State University and Big Bend National Park, National Park...”
Published 2006
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8Published 1980“...[Big Bend Natural History Association in cooperation with the National Park Service],...”
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9Published 1980“...[Big Bend Natural History Association in cooperation with the National Park Service],...”
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10Published 1982“...Big Bend Natural History Association in cooperation with the National Park Service,...”
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11“...U.S. Department of the Interior, National Park Service, Natural Resource Program Center,...”
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12by Sullivan, Timothy J. (Timothy Joseph), 1950-“...U.S. Department of the Interior, National Park Service, Natural Resource Program Center,...”
Published 2011
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13“...U.S. Department of the Interior, National Park Service, Natural Resource Program Center,...”
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14by Nadeau, Andy“...U.S. Department of the Interior, National Park Service, Natural Resource Stewardship and Science,...”
Published 2014
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15“...U.S. Department of the Interior, National Park Service, Natural Resource Stewardship and Science,...”
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16“...U.S. Department of the Interior, National Park Service, Natural Resource Stewardship and Science,...”
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17by Ivey, James E.“...Division of History, Southwest Cultural Resources Center, National Park Service, U.S. Dept...”
Published 1990
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18by Ivey, James E.“...Division of History, Southwest Cultural Resources Center, National Park Service, U.S. Dept...”
Published 1990
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