00578cam a22001812a 4500 unk83035839 DLC 20260227112800.0 830825s1921 dcu 100 0 spa unk83035839 DLC CarP DLC HD4813 .P3 1921c Pan-American Federation of Labor. Congress. (3rd : 1921 : Mexico) Informe oficial del tercer Congreso de la Confederación Obrera Pan-Americana. [Washington, DC : s.n., 1921?] 144 p. ; 18 cm. Working class Congresses. 91444 91444