00310nam a2200109Ia 4500008004100000040003800041100001700079245003500096250000800131260004600139300001500185211217s9999    xx            000 0 und d  cJayakar Knowledge Resource Centre  aWoll, John W 0aFunctions of several variables  a1st  bHarcourt, Brace and WorldaNew Yorkc1966  axi,169p p.