Marshall Durbin and Haydée Seijas 1973 Willem F. H. Adelaar and Pieter C. Muysken 2004: 114-115
Opón-Carare, an extinct far western Cariban language, is missing from E16/E17/E18/E19/E20/E21/E22/E23/E24/E25/E26/E27 ( Marshall Durbin and Haydée Seijas 1973 , Miguel Sánchez Pardo and Roberto Pineda Giraldo and Camilo Robayo 1998 , Geo von Lengerke 1878 ).
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