TY  - BOOK
AU  - Frankel, Theodore
AU  - 
TI  - Gravitational curvature: an introduction  to Einstein's theory
SN  - 0-7167-1006-4
U1  - 531.5 
PY  - 1979///
CY  - San francisco
PB  - W.H. Freeman and Company
KW  - Relativity - Physics
KW  - Gravitation
ER  -