UGSA
... that the Algerian communist trade union centre UGSA disbanded itself in 1957, after the rival nationalist UGTA had participated in the Leipzig congress of the World Federation of Trade Unions?
... that the <a href="./Algeria" id="mwDm8" rel="mw:WikiLink" title="Algeria">Algerian</a> <a href="./Algerian_Communist_Party" id="mwDnA" rel="mw:WikiLink" title="Algerian Communist Party">communist</a> <a href="./Trade_union" id="mwDnE" rel="mw:WikiLink" title="Trade union">trade union</a> centre <b id="mwDnI"><a href="./Union_générale_des_syndicats_algériens" id="mwDnM" rel="mw:WikiLink" title="Union générale des syndicats algériens">UGSA</a></b> disbanded itself in 1957, after the rival <a href="./National_Liberation_Front_(Algeria)" id="mwDnQ" rel="mw:WikiLink" title="National Liberation Front (Algeria)">nationalist</a> <a class="mw-redirect" href="./UGTA" id="mwDnU" rel="mw:WikiLink" title="UGTA">UGTA</a> had participated in the <a href="./Leipzig" id="mwDnY" rel="mw:WikiLink" title="Leipzig">Leipzig</a> congress of the <a href="./World_Federation_of_Trade_Unions" id="mwDnc" rel="mw:WikiLink" title="World Federation of Trade Unions">World Federation of Trade Unions</a>?