Essay submitted for the Adams Prize by Hawking's friend Jayant Narlikar using a Machian approach to explain the steady-state theory of the universe
1966
Book with early contributions to quantum gravity by pioneer Bryce DeWitt
1966
Book with collection of essays, outcome of contest to meet Stephen Hawking
1998
Book with John Archibald Wheeler's "law without law" approach to physics, sent to Hawking for discussion
1982
