A late Wisconsin buried peat at North Branch, Minnesota. - New Haven, CT.

von Fries, Magnus
Veröffentlicht in American journal of science ; 259.1961, S. 679-693 : 6 Ill.
1961.

Pollen profiles of late pleistocene and recent sediments from Weber Lake, northeastern Minnesota.- Washington, D.C.

von Fries, Magnus
Veröffentlicht in Ecology; 43.1962, no. 2, S. 295-308: 6 Ill.; 1 Tab.; 4 Falttaf.
1962.