RG21, R214, Accession/BAN: 2015-00766-0, File number: CEF #5 29-40, File title: Alterations to Geodetic Survey Building Ottawa Ontario, File part of: Department of Mines and Resources buildings [architectural drawing], Date: 1902-1953, Item ID number: 4817661 RG21, R214, acquisition/BAN : 2015-00766-0, numéro de dossier : CEF #5 29-40, titre du dossier : « Alterations to Geodetic Survey Building Ottawa Ontario, File part of: Department of Mines and Resources buildings [architectural drawing] », date : 1902-1953, numéro d'identification : 4817661