Niwata, Noriaki, 1927- Niwata, Noriaki, 1927- The economic theory of insurance and social security. - Tokyo, Society of Business and Commerce, Keio University, 1971. - Keio monographs of business and commerce ; 3 . Includes bibliographical references. LCCN: 72182128 //r84 Nat. Bib. No.: Ja*** Subjects--Topical Terms: Social security. LC Class. No.: HD7091 / .N65 Dewey Class. No.: 368.4