Title: Field trip guide to the structural geology of Whitney and Tisdale townships, district of Cochrane.  by D.W. Piroschco and K. Kettles
Subjects: COMDA 1985-1990, Tisdale Twp, Whitney Twp, Geology - Guidebooks - Ontario - Whitney Twp, Porcupine area, Geology - Guidebooks - Ontario - Tisdale Twp