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2. : 2 () . : 1. , . 2. . 3. . 4. , , . 5. . 3. 4. , 5. : 1. 2 . 2. . 3. 900 . , 600 . , 397 . . 4. , . 5. , , . 6. . 6. : 1. 2. http:// bibkez.umi.ru/ 3.: bibkez.umi.ru 4. ( ) 8 341258 3-17-80 5. trefil1@udm.net 6. - , , 3-17-80 (8341258) 7. - , , 3-17-80 (8341258)
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