00458nam a2200181 a 450000100080000000500110000800800410001910000170006024500380007726000490011530000110016465000210017565000130019665000160020965300110022565300230023670000170025920163712015-06-18       1981    bl uuuu      00u1 u    #d1 aBARBAULT, R.  aEcology of the chihuahuan desert.  aMéxico: Instituto de Ecología, A. C.c1981  a167 p.  aDesertificação  aEcologia  aEcossistema  aDesert  aNatural ecosystems1 aHALFFTER, G.