TY  - BOOK
AU  - Hagen, H. ,ed.
TI  - Geometric modeling :methods and applications
SN  - 3-540-53644-2
U1  - 006.6 
PY  - 1991///
CY  - New York
PB  - Springer-Verlag
KW  - Computer graphics
KW  - Special computer methods
N1  - Includes references
ER  -