TY  - BOOK
AU  - Soos G Y Ed.
AU  -  Szenthe J Ed.
TI  - Differential geometry
T2  - Colloquia mathematics societatis janos bolyai; 31
U1  - B6:3, M21 
PY  - 1982///
CY  - Amsterdam
PB  - North-Holland Publisher Co.       
ER  -