Litwack, Leon F. The American labor movement. - Englewood Cliffs, N.J. Prentice-Hall [1962] - 176 p. 21 cm. - A Spectrum book S-44 . Includes bibliography. LCCN: 62013726 /L Subjects--Topical Terms: Trade unions--History.--United States LC Class. No.: HD6508 / .L55 Dewey Class. No.: 331.880973