2000
CONABIO. 2000. The National Commission for the Knowledge and Use of Biodiversity (CONABIO). GIS data.
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Mexico
CONABIO. 2000. The National Commission for the Knowledge and Use of Biodiversity (CONABIO). GIS data.
Dietrich, W., P.H. Raven, and W.L. Wagner. 1985. Revision of Oenothera sect. Oenothera subsect. Emersonia (Onagraceae). Systematic Botany 10(1): 29-48.
Crosswhite, F. S. 1967. Revision of Penstemon Section Habroanthus (Scrophulariaceae 1: Conspectus. The American Midland Naturalist. Herbarium, Department of Botany, University of Wisconsin, Madison 53706. 3 p.
Nelson, E. W. and E. A. Goldman. 1929. A new wolf from Mexico. Journal of Mammalogy. 10:165-166.
Baker, R. H. and B. Bernardo Villa. 1960. Distribucion geografica y poblacion actuales del lobo gris en Mexico. An. Inst. Biol. Mex. Univ. Nacional Mexico. 30(12):369-374.
Wood, S., G. Harper, E. Muldavin, and P. Neville. 1999. Vegetation map of the Sierra del Carmen, U.S.A. and Mexico, Final report. Unpubl. report to US. Geological Survey, Biological Resources Division, and the National Park Service. 55p +app.