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by Ehrlich, Paul E.; Ceballos, Gerardo; Ehrlich, Anne H.
by Cartron, Jean-Luc E.; Ceballos, Gerardo; Felger, Richard Stephen
by Dirzo, Rodolfo; Young, Hillary S.; Mooney, Harold A.; et al.
by Castillo Ceballos, Gerardo
by Ceballos, Gerardo Castillo
by Ceballos, Gerardo y Gisselle Oliva (coords.)