Leighton, Walter.
Introduction to the Theory of Differential Equations / - 1st ed / - New York : McGraw-Hill Book Company Inc. , 1963 - p.174,vii :
Mathematics
B333 / J2
Introduction to the Theory of Differential Equations / - 1st ed / - New York : McGraw-Hill Book Company Inc. , 1963 - p.174,vii :
Mathematics
B333 / J2