Keywords: Maler Researches in the Central Portion of the Usumatsintla Valley Plate V 1.png en Plate V no 1 from Researches in the Central Portion of the Usumatsintla Valley published in 1901 Maler's men in Indian dugout or cayuco 1901 Researches in the Central Portion of the Usumatsintla Valley 1901 Teobert Maler other versions PD-old-70-1923 Uploaded with UploadWizard Researches in the Central Portion of the Usumatsintla Valley Lake Pethá Black and white photographs of lakes Canoes Monoxylons of North America |