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Are you Manfred Hegger, author of the books below?
Construction Materials Manual (Construction Manuals by Manfred Hegger Basics Materials by Manfred Hegger Energy Manual by Manfred Hegger Energy Manual by Manfred Hegger Baustoff Atlas (Detail Atlas) by Manfred Hegger Atlante dei Materiali by Manfred Hegger Atlante della Sostenibilità by Manfred Hegger Energie Atlas by Manfred Hegger Scale by Manfred Hegger Energie Atlas by Manfred Hegger


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