000 002830000a22001090004500
090 _aAR
_b04674
100 1 _aErwin , Terry L.
_998060
245 1 0 _aHow many species are there?
_srevisited
041 0 _aInglés
942 _cARTICULO
773 1 _tConservation biology
_h3
_q330-333
_d1991
_g5
999 _c13774
_d13774