Oh good - glad it helps! Yay! For 1930 census for Mary, look in Ramsey County, Minnesota for "Michael Giampaola" b 1908 and Mary Giampaola. For 1930 census for Louis, check out "Louis Ulman" in Washington County, Minnesota.
About this comment of yours: "The other researcher you mentioned was me under a former user name and e-mail."
I posted the link because you had posted an orphan query. That is, you had replies to your opening query from another researcher of this family, but you made no posts after your opening query, so it seemed you had never stopped back and found your messages and connected with the other researcher. Hence the link guiding you back to that spot.