Pennsylvania labor and industry review /
Commonwealth of Pennsylvania, Department of Labor & Industry.
Keystone labor and industry
Harrisburg, [Pa.] : Pennsylvania Dept. of Labor and Industry, 1939-1949, 1952-1953.
Labor / Pennsylvania /
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|Limited (search only)1939-42||University of Illinois at Urbana-Champaign|
|Limited (search only)1943-49||University of Illinois at Urbana-Champaign|