1. 01. English Non Fiction Black holes in spacetime / by Ferguson, Kitty. Publication: New York : F. Watts, 1991 . 143 p. : 24 cm. Date:1991 Availability: Copies available: (1), Actions:
2. 01. English Non Fiction Unveiling the edge of time : black holes, white holes, wormholes / by Gribbin, John R. Publication: New York : Harmony Books, 1992 . viii, 248 p. : 23 cm. Date:1992 Availability: Copies available: (1), Actions:

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