TY  - BOOK
AU  - Escher,M.C.
AU  - Schattschneider,Doris
TI  - Visions of symmetry: notebooks, periodic drawings, and related work of M.C. Escher 
SN  - 0716721260
PY  - 1990///
CY  - New York
PB  - W.H. Freeman
KW  - Escher, M. C.
KW  - Color in art
KW  - Symmetry (Arts)
ER  -