Adams, R. E. W. (1974). Preliminary reports on archaeological investigations in the Rio Bec area, Campeche, Mexico. National Geographic Society, Tulane University.
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Chicago-čujuhus (17. p.)
Adams, Richard E. W. Preliminary Reports on Archaeological Investigations in the Rio Bec Area, Campeche, Mexico. New Orleans: National Geographic Society, Tulane University, 1974.
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MLA-čujuhus (9. p.)
Adams, Richard E. W. Preliminary Reports on Archaeological Investigations in the Rio Bec Area, Campeche, Mexico. National Geographic Society, Tulane University, 1974.
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