00253nam a2200121Ia 4500020001500000082001800015100002500033245001600058260002700074300002000101500000500121700000500126  a0224017373  a330bSc392.GW  aSchumacher, E. Fritz  aGood workb  aLondonbJonathanc1979  axi, 148p. Index  a  a