TY  - DATA
AU  - Friedrich W Hehl, Claus Kiefer, Ralph J.K. Metzler
TI  - Black Holes: Theory and Observation
SN  - 9783540495352
PY  - 1998///
PB  - Springer Berlin Heidelberg
KW  - Physics and Astronomy
UR  - https://doi.org/10.1007/b13593
ER  -