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General Relativity and Gravitation
by Ashtekar, Abhay; Berger, Beverly K.; Isenberg, James; et al.
ISBN: 9781108810241
Copyright:
Paperback
ISBN: 9781107037311
Hardcover
Loops, Knots, Gauge Theories and Quantum ...
by Rodolfo Gambini , Jorge Pullin , Foreword by Abhay Ashtekar
ISBN: 9780521654753