31 | Blum | Bluman, Allan. Elementary statistics [Текст] : a step by step approach / Allan G. Bluman. — 5th ed. — Boston a.o. : McGraw-Hill: Higher education, 2004. — 25,[7],810 p. : ill. + 1 CD-ROM + додаток "Important formulas" (1 арк.). |
| ISBN 0-07-254907-6 | |
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