Strike, - 1939Strike, - 1945Strike, - 1945Strike, - 1945Strike, - 1945Strike, - 1945Strike, - 1945Strike, - 1945Lockout, - 1930Lockout, workers demanded a wage raise - 1920Strike, - 1920Strike, - 1925Strike, - 1922Strike, - 1929Strike, - 1924Strike, - 1927 Minerals (unspecified)
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