00313nam a2200121Ia 4500008004100000100001600041245005700057260002800114300000900142650001600151942000700167999001700174190216s9999||||xx |||||||||||||| ||und|| aAmaranath.T 0aPartial Differential Equations :an Elementary Course bNarosa Pubs Housec1997 a135p aMathematics cBK c31494d31494