Supertabular + minipage

Supertabular + minipage

I have a very long but narrow table (3 columns but 800 rows) and I would
like to have it such that the table starts on the left side of the page
and breaks onto the right side of the page before breaking again to
continue on the left of a new page and so froth. I've tried supertabular
but I'm not too sure how to proceed with minipage. (Perhaps it's not even
the right option?) I would appreciate any help. Thanks!
Hope the diagram helps.
PAGE 1
row 1 row m+1
. .
. .
. .
row m row n
PAGE 2
row n+1 row k+1
. .
. .
. .
row k row l