00283nam a2200109 a 450000500170000010000060001711000190002324500540004226000360009630000260013271000150015820251203090505.0  d_  aPickett, S.T.A  aEcology of natural disturbance and patch dynamics  aNew DelhibAcademic Pressc1985  axvi,472p.c22 cm.bHB  aWhite, P.S