http://www.fallingrain.com/world/MG/a/
http://www.britannica.com/eb/article?tocId=80013
I'm too lazy to get "trial free access". :-)
Mongolian and Russian literation are not coincidental, since some Mongolian pronounciations cannot be approximated by Russian letters,
and then there's the Sanskrit-based vertical writing that was current before Mongolia became a Communist territory way back when.
http://www.omniglot.com/writing/mongolian.htm