出版社：New York ; London : McGraw-Hill book company, inc., 1941.,Edinburgh : Oliver & Boyd, 1972.,New York : American Mathematical Society, 1950.,N.Y. : McGraw-Hill, 1941,New York : McGraw-Hill, 1941.,London Chapmen and Hall 1962,New York, London, McGraw-Hill book company, inc., 1941.,New York, Wiley, 1962.,London : University of London, the Athlone Press, 1954
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