00959nam a22003012 4500 8265 BDjRUL 20211208234544.0 140118s1962 enka 001 0 eng d (BDjRUL)8310 DLC/ICU CGU UKM EQO eng eng 517.38 HEI 1962 Heading, John. 25768 An introduction to phase-integral methods / J. Heading M. A London ; Methuen : New York : Wiley, c1962 160 p. : illus. ; 20 cm. Methuen's monographs on physical subjects Includes bibliography. Differential equations, Linear Numerical solutions. 25769 Integrals. 25770 Mathematical physics. 1138 Phase-integral methods. Methuen's monographs on physical subjects 25795 ddc BK 8265 8265 0 0 ddc 0 1 NFIC RUCL RUCL reading 1967-12-08 Book veiw dhaka 21.00 0 517.38 HEI 1962 2014-01-18 00:00:00 C-1 2014-01-18 BK