Introduction to sets and mappings in modern economics. Translated by Kazuo Sato. Gendai keizaigaku no sūgakuteki hōhō. English Nikaido, Hukukane, 1923- Economics, Mathematical. HB74.M3 N4933 330.182 NII Translation of Gendai keizaigaku no sūgakuteki hōhō. Bibliography: p. 335-338. Amsterdam, North-Holland Pub. Co., 1970. 1970. 1970 Text xiii, 343 p. : eng engjpn