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by Sharpe, Robert J.; McMahon, Patricia I.
by Mastny, Vojtech; Liqun, Zhu; Kramer, Mark; et al.
by McMahon, Robert J.
by Robert J. Sharpe; Patricia I. McMahon
by McMahon, Robert
by McMahon,Robert
by Kansas Association of School Librarians Research Committee; Grover, Robert; Fox, Carol; et al.
by McMahon, Robert J.; Peters, Ray Dev
by Peters, Ray Dev; Leadbeater, Bonnie J. Ross; McMahon, Robert J.; et al.