Gene flow across tribal barriers and its effects among the amazonian icana river indians - Salzano, F M; Gershowitz, H; Mohrenweiser, H; Neel, J V; Smouse, P E; Franco, M H L P; Simões, A L; Constans, J; Oliveira, A E; Freitas, M J M; Mestriner, Moacyr Antonio (American Journal of Physical Anthropology, 1986)