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| 041 | _aEnglish | ||
| 082 | _a515.35/ELS/OIF | ||
| 245 | _aDIFFERENCIAL EQUATIONS AND THE CALCULUS OF VARIATIONS | ||
| 260 |
_bMIR PUBLISHERS _aMOSCOW _c1970 |
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| 300 | _c440P | ||
| 650 | _aDIFFERENTIAL EQUATIONS | ||
| 650 | _aMATHEMATICS | ||
| 942 | _cBK | ||
| 999 |
_c75666 _d75666 |
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