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“W. G. E. Caldwell, B.Sc., Ph.D. (Glasgow), D.Sc. (Sask.), F.R.S.C.; a career resume”, in Impacts and mass extinctions; papers in honor of Glen Caldwell--Impacts et extinctions massives; articles en l'honneur de Glen Caldwell, vol. 38, National Research Council of Canada, Ottawa, ON, Canada, 2001, pp. 121-123.
, GeoRef, Copyright 2018, American Geological Institute.2001-036539Caldwell, W. Glen E.
“W. G. E. Caldwell, B.Sc., Ph.D. (Glasgow), D.Sc. (Sask.), F.R.S.C.; a career resume”, in Impacts and mass extinctions; papers in honor of Glen Caldwell--Impacts et extinctions massives; articles en l'honneur de Glen Caldwell, vol. 38, National Research Council of Canada, Ottawa, ON, Canada, 2001, pp. 121-123.
, GeoRef, Copyright 2018, American Geological Institute.2001-036539Caldwell, W. Glen E.
“What happened to the spirally lophophorate brachiopods during the multiple Late Ordovician mass extinctions?”, in 9th North American paleontological convention; abstracts, vol. 9, North American Paleontological Convention, [varies], International, 2009, p. 177.
, GeoRef, Copyright 2018, American Geological Institute.2010-056626AthyrididaAtrypida