00392    a2200133   4500020001500000082001900015100002000034245005000054260003900104300002100143650002300164650003300187650003800220  a0881922498  a333.95316bGIV  aGiven, David R.  aPrinciples and practice of plant conservation  aPortlandbTimber Pressc1994g1996  aviii,292p.c27cm  aPlant conservation  aEconomics of land and energy  aBiological diversity conservation