First vertical derivative of magnetic field with Keating coefficients map : Peterbill : 42 B/11.
Series: Ontario.  Geological Survey.  Map 81 714; Canada. Geological Survey. Open file 4071
Publisher: Ministry of Northern Development & Mines; Geological Survey of Canada
Place of publication: Sudbury; Ottawa
Language: eng
Number of pages: 50
Subjects: Geology - Ontario - Peterbill; NTS 42 B/11
Notes: 11