National Labor Board
...that the National Labor Board established the doctrine of representational exclusivity in American labor relations, a rule still used today?
...that the <b id="mwUw"><a href="./National_Labor_Board" id="mwVA" rel="mw:WikiLink" title="National Labor Board">National Labor Board</a></b> established the doctrine of representational exclusivity in American labor relations, a rule still used today?