TY  - BOOK
AU  - Greub,W.,et al
ED  - Halperin, S
ED  - Vanstone, R
TI  - Connections, curvature & cohomology, Vol.III: cohomology of principal bundles & homogeneous spaces
T2  - Pure & applied mathematics 47-III
SN  - 0123027039
U1  - 8.06 
PY  - 1973///
CY  - New York
PB  - Academic Press
ER  -