TY  - GEN
AU  - Tu, Loring W. 
TI  - An introduction to manifolds
SN  - 9781441973993
U1  - 516.07 TU/I 
PY  - 2011///
CY  - New York
PB  - Springer 
KW  - De Rham Theory
KW  - Geometry of manifolds
ER  -