1. Muhlenbergia (Poaceae) de Chihuahua, México

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2. Las huellas de la razón : la expedición científica de Centroamérica, 1795-1803

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5. La comisión naturalista de Löfling en la Expedición de Límites al Orinoco

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8. The genus Mikania (Compositae-Eupatorieae) in Mexico

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9. La flora del Valle de México.

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10. Las pináceas mexicanas.

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11. Lauráceas.

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12. Preparación de ejemplares botánicos para herbario

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