TY  - BOOK
AU  - Ludvigsen, Malcolm.
TI  - General relativity: : A geometric approach
SN  - 0521630193
U1  - 530.11 
PY  - 1999///
CY  - New York: 
PB  - Cambridge University Press, 
KW  - Cosmology
KW  - Flat spacetime
KW  - Geometries and spacetimes
KW  - Physics
ER  -