The antiquity of the Sheguiandah Site. - Ontario. enth.: Geologic observations at the Sheguiandah Site / by J. T. Sanford - Lee, Thomas E. (The canadian field naturalist ; 71.1957, no. 3, S. 117-137 : 12 Ill. ; 1 Tab ; S. 138-148 : 6 Ill., 1957)