How porcupines make love notes on a response-centered curriculum. Edited by Alan C. Purves. Contributing authors: Wallace W. Douglas [and others].

by Purves, Alan C. 1931-1996., Douglas, Wallace W. 1914-1995
Published 1972

How porcupines make love ; notes on a response-centered curriculum / Edited by Alan C. Purves. Contributing authors: Wallace W. Douglas [and others].

by Purves, Alan C. 1931-1996., Douglas, Wallace W. 1914-1995
Published 1972

Selected essays / Edited by Alan C. Purves.

by Spencer, Theodore, 1902-1949.
Published 1966