TY  - BOOK
AU  - Levi-Civita,Tullio
AU  - Dougall,John
TI  - A simplified presentation of Einstein's - unified field equations
AV  - QC178 L4
PY  - 1929///
CY  - London
PB  - Blackie
KW  - Einstein, Albert,
KW  - Gravitación
KW  - Electromagnetismo
ER  -