ESSER, M. (1968). Differential equations. W.B. Saunders.
Chicago Style (17th ed.) CitationESSER, Martinus. Differential Equations. London: W.B. Saunders, 1968.
MLA (9th ed.) CitationESSER, Martinus. Differential Equations. W.B. Saunders, 1968.
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