Gutierrez Olivos, Sergio, 1920-

http://www.worldcat.org/oclc/55300067

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http://www.worldcat.org/oclc/55301375

http://www.worldcat.org/oclc/55301388

http://www.worldcat.org/oclc/55301335

http://www.worldcat.org/oclc/55310870