TY  - BOOK
AU  - Bar, Christian  
TI  - Elementry differential geometry 
SN  - 978-1-107-60396-7
U1  - 516.36 
PY  - 2011///
CY  - Cambridge 
PB  - Cambrdige University Press  
KW  - Geometry, Differential
UR  - www.cambridge.org
ER  -