Conselho Indigenista Missionrio (CIMI), Comunidade Indgena do Rio Tiqui, Associao da Unio das Comunidades Indigenas do Rio Tiquie (AUCIRT), Unio das Nacoes Indigenas (UNI), Brazil: cost of an assembly of Indian leaders; cost of sending a Tukano leader to Brasilia to present the community's case for the demarcation of their lands, 1981-1986