00379nam a2200133Ia 4500020001500000082001900015100002300034245005300057260002900110300002700139490006900166500000500235700000500240  a0898714818  a511.6bC819.CO  aCornuejols, Gerard  aCombinatorial optimizationbpacking and covering  aPhiladelphiabSIAMc2001  axi, 132p. Bibl. Index.  aCBMS-NSF regional conference series in Applied Mathematics v 74  a  a