amazonriverandvalley bodymarking bodypainting brasil brazil cayapofeatherwork cayapolanguage clothing costumeandadornment culturaindígena economicconditions economicdevelopment education educationandstate effectofhumanbeingson environmentalaspects environmentalaspectsofeconomicdevelopment environmentalaspectsoflandsettlement ethnoscience exhibitions facepainting feather-work featherwork frontierandpioneerlife governmentpolicy homeschooling indiansofsouthamerica kayapó landsettlement landtenure languageandeducation music mythology nature oraltradition pictorialworks politicalaspects politicsandgovernment ritesandceremonies socialconditions sociallifeandcustoms socialpolicy xinguriverregion