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by Trippett, David; Walton, Benjamin
by Walton, David S.; Dobos, Nancy J.
by Walton, David J.; Lorimer, J. Phillip
by De Ferranti, David M.; Perry, Guillermo E.; Ferreira, Francisco H. G.; et al.
by David Walton
by Walton, David
by Edited by Bruno Battaglia , Jose Valencia , David Walton
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