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by Hirt, Robert P.; Horner, David S.
by Fargo, Ford; Smith, Troy D.; Reasoner, James; et al.
by Jean-Michel Hirt
by Hirt; Robert P
by HIRT
by Hirt, Mary
by Hirt, Gerhard; Kopp, Reiner
by Moritz, K. P.; Hirt, A.
by Ferrell, O. C.; Hirt, Geoffrey; Ferrell, Linda
by Hirt, Hermann Alfred