1 - Conceptual problems of quantum gravity : based on the proceedings of the 1988 Osgood Hill Conference, North Andover, Massachusetts, 15-19 May 1988 |
2 - Lectures on non-perturbative canonical gravity |
3 - Quantum gravity : an oxford symposium held at the Rutherford Laboratory, Chilton, February 15-16, 1974 |
4 - Quantum theory of gravity : essays in honor of the 60th birthday of Bryce S. DeWitt |