TY  - BOOK
AU  - Schaffer Juan Jorge
TI  - Geometry of spheres in normed spaces
T2  - Lecture notes in pure and applied mathemtics; 20
U1  - B636, L6 
PY  - 1976///
CY  - New York    
PB  -  Marcel Dekker       
KW  - Three dimension geometry
ER  -