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by Humphreys, R. Stephen
by Rodri´guez, Pla´cido; Humphreys, Brad R.; Simmons, Robert
by Lynch, John; Humphreys, R. A.
by Humphreys, R. A.
by A. R. Humphreys
by Humphreys, J. R.
by Shauna Devine; Guy R. Hasegawa; James M. Edmonson; et al.