Thread: Instrumental endings...

I'm at a computer w/out cyrillic, so forgive me, but...

What is the instrumental ending for (eya) endings.
Like lecture, history, cafeteria, etc...?

лекция (nominative) - лекцией (instrumental)
история (nominative) - историей (instrumental)
кафетерий (nominative) - кафетерием (instrumental) (note that it is masculine, not feminine)

Thank you so much. I was totally drawing a blank. The textbook that I have is not very informative.