Dean School, Dean, MT ID: 4680 | This file appears in: Dean School Overview with Beartooth Mountains, looking south at Dean School | Creator: Joan Brownell, photographer | Date: May 2019 | Source: National Register of Historic Places nomination form for Dean School. On file at the Montana State Historic Preservation Office, Helena, MT. Download Original File CreatorJoan Brownell, photographerSourceNational Register of Historic Places nomination form for Dean School. On file at the Montana State Historic Preservation Office, Helena, MT.DateMay 2019 "Dean School, Dean, MT" appears in: Dean School