United States.
Eight-hour laws.
Washington, [D.C.] : G.P.O., 1912.
Cover title.
Public laws: no. 193, 52d Congress, 1st session -- No. 28 (extract), 59th Congress, 1st session -- No. 381 (extract), 59th Congress, 2d session -- No. 479 (extract), 61st Congress, 3d session -- No. 199 (extract), 62d Congress, 2d session.
Eight-hour movement -- United States.
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