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Per Tengstrand ger konsert i Olaus Petri-kyrkan i Helsingfors 6 maj - Wallstiftelsen
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https://jarkkotontti.net/esseet-ja-arvostelut/olaus-petri-and-the-rules-for-judges-associations/
Olaus Petri And The Rules For Judges. Associations 1/2000. - Jarkko Tontti
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