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Anchor text: An Unfinished Revolution? Heinz von Foerster and the Biological Computer Laboratory | BCL 1958–1976.

Wikipedia: Heinz von Foerster

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Anchor text: Edition Echoraum

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Anchor text: Edition Echoraum

Wikipedia: Conversation theory

Anchor text: ''Echoraum 1+1=15,3 Ι piano soli, Klavierfestival'', echoraum.at

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