00761cam a22002531 4500 gs 11000342 DLC 20260227111311.0 721206s1911 oncf 000 0 eng gs 11000342 (OCoLC)507358 DLC OAkU NSbSU DLC premarc QE781 Springer, Frank, 1848-1927. On a Trenton Echinoderm fauna at Kirkfield, Ontario. Ottawa, Government Printing Bureau, 1911. 68 p. V pl. 25 cm. Geological Survey of Canada. Memoir 15-P Paleontology Ontario. Paleontology Ordovician. Echinodermata. Memoir (Geological Survey of Canada) ; 15 25043 25043