Canfield, Bertrand R. Public relations; principles, cases, and problems / Bertrand R. Canfield and H. Frazier Moore. - 6th ed. - Homewood, Ill.: R. D. Irwin, 1973. - xvi, 486 p. ; 24 cm. ISBN: 0256014264 Subjects--Topical Terms: Public relations. Dewey Class. No.: 659.2 / CAP 1973