1
by Hofstadter, Douglas R., 1945-
Published 1980
Book
2
Published 1992
Book
3
Published 1994
Movie VHS
4
by Escher, M. C. 1898-1972.
Published 1992
Book
5
by Escher, M. C. 1898-1972.
Published 2000
Book
6
by Hofstadter, Douglas R., 1945-
Published 1999
Book