Spiegel, M. R. (1971). Theory and problems of calculus of finite differences and differential equations. Mc Graw - Hill.
शिकागो स्टाइल उद्धरणSpiegel, Murray R. Theory and Problems of Calculus of Finite Differences and Differential Equations. New York: Mc Graw - Hill, 1971.
एमएलए उद्धरणSpiegel, Murray R. Theory and Problems of Calculus of Finite Differences and Differential Equations. Mc Graw - Hill, 1971.
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