H.W. Heinrich, Dan Petersen, Nestor Roos

Tokyo : McGraw-Hill c1980 5th ed

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G.F. Michelbacher, Nestor R. Roos ; with the cooperation of a group of specialists

McGraw-Hill c1970 2nd ed McGraw-Hill insurance series

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Division of Research, College of Commerce, Louisiana State University 1951 Louisiana business bulletin vol. 13, no. 3

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