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by Harper, John
by Stottlemyre, Mel; Harper, John
by Mullins, John; Walker, Orville C.; Boyd, Jr. Harper W
by Andrew H. Cobb (Harper Adams University College); John P. H. Reade (Harper Adams University College)
by Editor: John H. Schuh (Iowa State University, Ames); Editor: Susan R. Jones (University of Maryland, College Park); Editor: Shaun R. Harper (University of Pennsylvania, Philadelphia)
by Harper, John E.
by Cantor, John; Harper, Gavin