004220000a2200121000450024500980000065000290009865000180012765000320014565100220017704100130019910000200021277300680023210aGeographical aspects of bird-flower coevolution, with particular reference to Central America14aRelación planta-animal14aCoevolución14aDistribución geográfica 4pAmérica Central0 aInglés1 aStiles, F. Gary1 tAnnals of the Missouri Botanical Garden3157h68q323-351d1981