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OnArchitecture
Datenbank-Infosystem (DBIS)
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Union List of Artist Names Online
Datenbank-Infosystem (DBIS)
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Pidgeon Digital
Datenbank-Infosystem (DBIS)
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competitionline
Datenbank-Infosystem (DBIS)
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Dictionary of Irish Architects
Datenbank-Infosystem (DBIS)
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Architektenlexikon Wien 1770 - 1945
Datenbank-Infosystem (DBIS)