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1by Hilty, S.L. (comp.), Arizona Univ., Tucson (USA). Office of Arid Lands Studies eng
Published 1981Texto bibliotecaFAO IT -
2by 78113 Hilty, S.L. comp., 18538 U.S. Man and the Biosphere Program, Washington, D.C. (EUA)
Published pv.bibliotecaIICA -
3by 78113 Hilty, S.L. comp., 18538 U.S. Man and the Biosphere Program, Washington, D.C. (EUA)
Published pv.bibliotecaIICA -
4by 78113 Hilty, S.L. comp., 18538 U.S. Man and the Biosphere Program, Washington, D.C. (EUA)
Published pv.bibliotecaIICA