2. If you can get to Salt Lake City, obviously you can go to the FHL there and pull the references.If not, you can usually order them on loan through a local LDS church Family History Center.
3. You might also try doing an Interlibrary Loan through your local library.Chances are that some library in the USA with a copy of the desired reference will loan it to yours.
4. If you can get to Louisiana, I strongly recommend a visit to the Bluebonnet Branch of the East Baton Rouge Parish Library System.It's on the south side of Baton Rouge, and one of the best "local" genealogy reference centers I've found.
5. Specifically, if you're looking for Catholics in southern Louisiana, you will need to find the volumes of records compiled by Father Donald Hebert, known as the Southwest LA Records or the South LA Records, and/or the Baton Rouge Diocese Records.They have a wealth of information on Catholics (and pseudo-Catholics) back into the 1700's.
6. Lastly, remember that LA has "parishes" instead of counties.Same thing, basically.But, if you start doing Google searches on "Iberville County", you're not going to get many hits.