Wright, G. H. von 1916- An essay in deontic logic and the general theory of action; With a bibliography of deontic and imperative logic. - Amsterdam ;: North-Holland, 1968. - 112 p.: 25 cm. - Acta philosophica Fennica. fasc. 21 . Bibliography: p. [97]-107. LCCN: 68058531 //r86 Nat. Bib. No.: Ne68-43 Subjects--Topical Terms: Logic.Duty.Ethics.Act (Philosophy) Dewey Class. No.: 511.3 / W949e