ID:DA14198868
NWLB
N.W.L.B
United States. War Labor Board
National War Labor Board ( : U.S.)
War Labor Board ( : U.S.)
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G.P.O. 1922 Labor as affected by the war series , Bulletin / Bureau of Labor Statistics no. 287
所蔵館6館
Govt. Print. Off. 1920
所蔵館1館