THE GREAT LAKES: GEOLOGY AT WORKTOVELL WM.1979; J. SOIL WAT. CONSERV.; USA; DA. 1979; VOL. 34; NO 2; PP. 65-67; BIBL. 16 REF.Article

GATEWAYS TO HELL.TOVELL WM.1972; BULL. R. ONTARIO MUS., ROTUNDA; CAN; 1972, VOL. 5, NUM. 0003, P. 4 A 15Miscellaneous

SOUTHERN ONTARIO: A GEOLOGICAL OVERVIEWTOVELL WM; FREEMAN EB.sdTORONTO '78. GEOLOGICAL SOCIETY OF AMERICA, GEOLOGICAL ASSOCIATION OF CANADA, MINERALOGICAL ASSOCIATION OF CANADA JOINT ANNUAL MEETING/1978/TORONTO; CAN; WATERLOO: GEOLOGICAL ASSOCIATION OF CANADA; DA. S.D.; PP. 148-159; BIBL. 2 P.; 3 ILL.Conference Paper