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by Trefil, James; Calvo, Rita Ann; Cutler, Kenneth, Ms.
by Trefil, James (CON); Calvo, Rita Ann (CON); Cutler, Kenneth, Ms. (CON)
by Trefil, James S.
by James Trefil (George Mason University); Robert M. Hazen (George Mason University)
by Hazen, Robert M.; Trefil, James
by Trefil; James
by Trefil, James