Nebraska Symposium on Motivation 1970.
Softcover, Lincoln, Nebraska: University of Nebraska Press, 1971. Very Good in No Dust Jacket dust jacket.
Softcover, Lincoln, Nebraska: University of Nebraska Press, 1971. Very Good in No Dust Jacket dust jacket.
Soft Cover, Washington: National Geographic Society, 1950. Very Good in No Dust Jacket dust jacket.
Soft Cover, Sewanee, Tennessee: The University of The South, 1940. Good in No Dust Jacket dust jacket.
Softcover, Philadelphia: History of Science Society, 1981. Very Good in No Dust Jacket dust jacket.