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The Variational Principles of Mechanics (Dover Books on Physics) [Buy it!] | Cornelius Lanczos | USD 64.19 (Fri May 17 19:13:10 2024) | Abebooks | Hafa Adai Books | ISBN10: 0486650677, ISBN13: 9780486650678, [publisher: Dover Publications] Softcover [Moncks Corner, SC, U.S.A.] [Publication Year: 1986] |