TY  - BOOK
AU  - Spivak,Michael
TI  - Comprehensive introduction to differential geometry : vol.4
SN  - 0914098721
U1  - 516.36 SP49C3 
PY  - 1999///
CY  - Houston
PB  - Publish Or Perish
KW  - Mathematics
KW  - Geometry
ER  -