The top documents tagged [yrs bp qwkhargis ranch]

THREE NOVELLAS: PAST, PRESENT AND FUTURE CONDITIONS OF THE SAN PEDRO RIPARIAN NATIONAL CONSERVATION AREA Mark A. Gonzalez National Riparian Service Team.

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Mark A. Gonzalez National Riparian Service Team

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Historical Evolution of the San Pedro River: 8 000 yrs BP to AD 1950 s

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