Abstract

Get full access to this article
View all access options for this article.
References
1.
Escher, M.C.
1961 ; 2 nd edition 1967 . The Graphic Work of M.C. Escher . London : Oldbourne .
2.
Mac Gillavry, C.H.
1965 . Symmetry Aspects of M.C. Escher's Periodic Drawings
Utrecht : International Union of Crystallography .
3.
Foulkes, S.H.
and
Anthony, E.J.
1957 ; 2 nd edition 1965 . Group Psychotherapy . Harmondsworth, Middlesex : Penguin Books .
4.
Foulkes, S.H.
1964 . Therapeutic Group Analysis . London : Allen and Unwin .
