Sipre ice-corer for obtaining samples from permanently frozen bogs. - Montreal.

von Hughes, Owen L.
Veröffentlicht in Arctic ; 16. 1963, No. 4, S. 271-272: 4 Ill.
1963.

The age of Lake Iroquois and Lake Ontario. - Chicago, IL.

von Karrow, P. F.
Veröffentlicht in The journal of geology ; 69.1961, no. 6, S. 659-667 : 4 Ill. ; 5 Tab.
1961.