Gregory, Charles Oskar. Labor law : cases, materials and comments / Charles Oskar Gregory and Harold A. Katz. - Charlottesville, Va : Michie Casebook, c 1948. - xxi, 1324 p. ; 24 cm. Includes index. 47 47 Subjects--Topical Terms: Labor law. Dewey Class. No.: 331.026 / G862l