Grève en Pologne
{{cite web | url=http://www.europeana.eu/resolve/record/04802/12258194C372B303809558198455EB02B804C946|title=Grève en Pologne|accessdate=2013-05-22 |publisher=Europeana}}
<ref>{{cite web | url=http://www.europeana.eu/resolve/record/04802/12258194C372B303809558198455EB02B804C946|title=Grève en Pologne|accessdate=2013-05-22 |publisher=Europeana}}</ref>