00337nam a2200121Ia 4500082001900000100003900019245003900058260003000097300002800127500002900155500000500184700002600189  a510.9bB617.MM  aBirchenhall, Chris and Grout, Paul  aMathematics for modern economicsb  aNew DelhibHeritagec1987  axii, 412p. Index, Bibl.  a"Heritage economy edn.".  a  aGrout, Paul ; jt. ed.