TY  - BOOK
AU  - Dold A.
AU  - Eckmann, B. 
TI  - Lecture Notes in Mathematics 970 :  : Twistor Geometry and Non- Linear Systems 
SN  - 3540119728 
U1  - 516.3 
PY  - 1982///.
CY  - New York: 
PB  - Springer Verlag; 
ER  -