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_aDifferential equations and the calculus of variations _fL. Elsgolts _gTransl. from the Russ. by George Yankovsky |
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_aΜ. _cMir _d1980 |
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| 300 | _aДоп. тит. л. на рус. яз.: Л. Э. Эльсгольц. Дифференциальные уравнения и вариационное исчисление | ||
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_9z01790 _aÉl'sgol'c _bL. É. _f1909-1967 _gLev Érnestovič _4070 |
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_9z01700 _aElsgolts _bL. _4070 |
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