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by Perez, Richard
by Richard Perez
by Gomez-Perez, Asuncion; Benjamins, Richard
by Hoskins, William J.; Perez, Carlos A.; Young, Robert C.; et al.
by Velazquez, Jose Luis Perez; Wennberg, Richard P.
by Perez-alvarez, Eliseo; Pococke, Richard; Spratt, Thomas
by Perez, William; Cortes, Richard Douglas