TY - BOOK T1 - Variational calculus in science and engineering A1 - Forray, Marvin J. LA - English PP - New York PB - McGraw-Hill YR - 1968 UL - https://ds.mainlib.upd.edu.ph/Record/UP-1685675941123764002 OP - 221 CN - QA 315 F58 KW - Calculus of variations. KW - Mathematical physics. KW - Engineering Mathematics. ER -