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G.M. Walker, G. Andrews and D. Jones
Pág. 161 - 166
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Walker, G. M. Moursy, H. E. Holland, C. R. Ahmad, M. N.
Pág. 81 - 84
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GM Al-Ghamdi, TR Ames, JC Baker, R Walker, CC Chase, GH Frank, and SK Maheswaran
Pág. 576 - 578
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Walker, G.M.; Holland, C.R.; Ahmad, M.N.; Fox, J.N.; Kells, A.G.
Pág. 282 - 288
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