833 resultados para key

Amphisbaena medemi, an interesting new species from Colombia (Amphisbaenia, Reptilia), with a key to the amphisbaenians of the Americas / Carl Gans and Sandra Mathers.

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v.72:no.2(1977)

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How to know the fresh-water algae; an illustrated key for identifying the more common fresh-water algae to genus, with hundreds of species named pictured and with numerous aids for their study.

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Some grasses of the Northeast : a key to their identification by vegetative characters.

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A field key to the genera of the wild and cultivated hardy trees of the northeastern United States and Canada, by Mary Franklin Barrett.

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Key facts and figures on the external dimension of the EU energy policy. Commission staff working paper accompanying the communication on security of energy supply and international cooperation. SEC (2011) 1022 final, 7 September 2001

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Employment in Europe 1996. Analysis of key issues. Initially published as COM (96) 485 final, 9 October 1996

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Employment in Europe 1997. Analysis of key issues. Initially published as COM (97) 479 final, 1 October 1997

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What is the Jobs Summit? Background to the Summit. Key papers. Related information. Jobs Summit, Luxembourg, 20-21 November 1997

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