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This report summarizes the findings of a linguistic and sociolinguistic survey conducted by helicopter on the upper Digul River as a follow-up to a survey conducted there seven months earlier. The purpose of the survey was to verify information already obtained and to further determine the number of languages and their locations in the upper Digul River area of Indonesia. Through the elicitation of wordlists, the use of sociolinguistic questionnaires, and informal observation, it was determined that the languages encountered were Wambon, Nakai, and Ketum. Vernacular language use is strong among the communities surveyed.