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by Rideout, Kenneth
by Zangwill, Andrew
by VanCleave, Janice; Walsh, Tina Cash
by Unknown
by Hatch, Edwin
by Stelzer, Selen
by Giancoli, Douglas C.
by Serway, Raymond A.; Jewett, John W.
by Feynman, Richard P.; Leighton, Robert B.; Sands, Matthew