Peterson, Florence American labor unions what they are and how they work. - 2d rev. ed. - New York Harper & Row [1963] - 271 p. illus. 22 cm. LCCN: 63010629 /L Subjects--Topical Terms: Trade unions--United States. LC Class. No.: HD6508 / .P42 1963 Dewey Class. No.: 331.880973