00382nam a2200121Ia 4500082001900000100001800019245009000037260003100127300002900158490006300187500000500250700000500255  a510.9bM532.CC  aMelzak, Z. A.  aCompanion of concrete mathematics; mathematical techniques and various applicationsb  aNew YorkbJohn Wileyc1973  axiii, 270p. Index, Bibl.  aPure and Applied Mathematicsv a Wiley interscience series  a  a