HeijmansStrike, organization of work - 1949Strike, wage raise - 1936Strike, collective agreement demanded by the employees - 1936Strike, wage raise - 1947Strike, improvement of raw material - 1947Strike, - 1947Strike, wage demands excluding wage raise - 1976Strike, collective agreement demanded by the employees - 1991Lockout, workers demanded a wage raise - 1910Strike, collective agreement demanded by the employees - 2004