You can call up all the RDA records in LC's catalog by going to catalog.loc.gov, choosing the Basic search, then selecting "Expert Search" under "Search Type." In the "Search Text" box, type 040e rda. Execute the search, and you will retrieve several thousand RDA records. You can apply search limits to this search, allowing you to confine your results to a certain type of record, e.g., only book records, or only serial records. 