TY  - BOOK
AU  - Witten,Louis
TI  - Gravitation: an introduction to current research 
U1  - 530.1 
PY  - 1962///
CY  - New York
PB  - John Wiley
KW  - Gravitation
KW  - Unified field theories
KW  - Quantum field theory
KW  - Gravitational waves
N1  - Includes bibliographical references and index
ER  -