3 0 . Reefs, Canada and Adjacent Area H.H.J. Geldsetzer, N P. James and G.E. Tebbult. Editors Canadian Society of Petroleum Geologists Memoir 13, 1989. p. 218-223
SMALL EARLY MIDDLE ORDOVICIAN PATCH REEFS, LAVAL FORMATION (CHAZY GROUP), CAUGHNAWAGA, MONTREAL AREA, QUEBEC BRIAN R. PRATT1
