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Upendra M. Sainju, Thecan Caesar-Tonthat, Andrew W. Lenssen, Robert G. Evans, Robert Kolberg
Pág. 332 - 341
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Jabro, Jay David; Evans, Robert G.; Stevens, William B.; Iversen, William M.
Pág. 35 - 45
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Ebel, Robert C; Proebsting, Edward L; Evans, Robert G
Pág. 1197 - 1201
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