RG21, R214, Accession/BAN: 2015-00766-0, File number: CEF #3 105-115, File title: Geophysical Laboratory - Dept. of Mines & Technical Surveys - Central Experimental Farm - Ottawa, 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 #3 105-115, titre du dossier : « Geophysical Laboratory - Dept. of Mines & Technical Surveys - Central Experimental Farm - Ottawa, File part of: Department of Mines and Resources buildings [architectural drawing] », date : 1902-1953, numéro d'identification : 4817661