TY  - BOOK
AU  - Callahan, James J.
TI  - The geometry of spacetime: an introducation to special and general relativity
T2  - Undergraduate Texts in Mathematics/ed.by S. Axler
SN  - 0387986413
U1  - 530.11 CAL 
PY  - 2000///
CY  - New York
PB  - Springer
N1  - Includes bibliographical references
ER  -