Shouldn't the tributary articles be located at XYZ River or Rio XYZ? There are bound to be names of Brazilian states, cities, and other places that use the names of the rivers.
--LMS
This is likely from some old ecyclopedia. I found it this morning in a terrible state. Pinkunicorn did a great job on the tributaries, and i'm just mopping up. Personally, i'm all for using the local names without the title in front or after (we are all friends here :-) --Anders Törlind