TY  - BOOK
AU  - Callahan,James
TI  - Geometry of spacetime: an introduction to special and general relativity 
SN  - 0387986413 (acidfree paper)
PY  - 2000///
CY  - New York
PB  - Springer
KW  - Relativity
KW  - Space and time
KW  - Algebra,linear
KW  - Calculus of variations
ER  -