Berg, L. (1967). Introduction to the operational calculus. North-Holland Pub. Co : J. Wiley.
Tohutoru Kātū Chicago (17th ed.)Berg, Lothar. Introduction to the Operational Calculus. Amsterdam : New York: North-Holland Pub. Co : J. Wiley, 1967.
Tohutoro MLA (9th ed.)Berg, Lothar. Introduction to the Operational Calculus. North-Holland Pub. Co : J. Wiley, 1967.
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