www.geologyontario.mndmf.gov.on.ca
, Index to Ontario Geological Survey (OGS) Preliminary map series (P series) digital images at Ontario Ministry of Northern Development and Mines
Scale 1:15,840 (W 91°30ʹ00ʺ--W 91°15ʹ00ʺ/N 48°45ʹ00ʺ--N 48°37ʹ30ʺ).
Note:
"Thunder Bay data series." Includes index map, data location map, and sources of information. "NTS reference: 52 B/11W." "ODM-GSC Aeromagnetic map: 1122G." "ODM Geological compilation series map: 2065." "Issued 1981."