Wilmington, Delaware : E.I. du Pont de Nemours & Company, 1952

New York : Harper & Row, 1970
First U.S. edition.

Boston : Little, Brown and Company, 1972
First edition.

St. Paul, Minn. : Minnesota Geological Survey, 1972

New York : Viking Press, 1971

Syracuse, New York : Syracuse University Press 1969
FIrst Edition.

New York, Schocken Books 1971

New York : Columbia University Press, 1969

New York, Harper & Row 1971

Notre Dame, Ind.] University of Notre Dame Press 1966

[Columbus] : Ohio State University Press, 1968

New York : Free Press, 1973

Garden City, N.Y., Doubleday, 1971

Minneapolis : University of Minnesota Press, 1948

New York, Holt, Rinehart and Winston 1970
[1st ed.].

New York, Norton 1970

New York, Oxford University Press, 1970

New York : Morrow, 1972

Syracuse : Syracuse University Press, 1969

New York : Reader's Digest Press, 1973
[1st ed.].