004880000a2200145000450024501000000065000190010065000160011965000290013565100220016465100240018604100130021070000210022310000230024477300750026710aComparative niche structure and evolution of mammals of the nearctic and southern South America14aBiogeografía14aEvolución14aVariación geográfica 4pAmérica del Sur 4pAmérica del Norte0 aInglés1 aRedford, Kent H.1 aEisenberg, John F.1 tSpecial Publication Pymatuning Laboratory of Ecology3481q77-84d1982