For some reason, the Wikipedia article makes no mention of any adpositions of any kind. I find it highly unbelievable that the language makes no use of such. It has a case system, but there's only 8 cases. Even Finnish with its massive 15 cases still makes use of some postpositions (if you can call them that).
Of course, I know Wikipedia isn't the most reliable source of information, but you know, its hard to find free reference grammars online. I don't get why the article would omit something like that. Really, all the article gives is the language's seemingly innumerable declensions and conjugations.