00374nam a2200145Ia 4500008004100000020001600041082001600057100001700073245002700090260004500117300000800162650001600170650001800186653002400204170901s1988    xx            000 0 und d  a812240006 X  a511.8bK12M  aKapur, J. N. 0aMathematical Modelling  aNew DelhibWiley Eastern Pvt. Ltd.c1988  a259  aMathematics  aPure Sciences  aMathematical models