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Maler Researches in the Central Portion of the Usumatsintla Valley Plate XXXII. en Plate XXXII from Researches in the Central Portion of the Usumatsintla Valley published in Piedras Negras Lintel Researches in the Central Portion of the Usumatsintla Valley Teobert Maler other versions PDold Researches in the Central Portion of