This annotated bibliography contains approximately 900 citations of material written about Puerto Ricans residing in the mainland United States. Also included is a section listing published bibliographies that cover literature on Puerto Rico and Puerto Ricans. Citations within each section are listed in alphabetical order by author or sponsoring institution, and include books, monographs published by public and private agencies, and articles from scholarly and popular periodicals, including newspapers. Most of the works cited were published after 1955, though some earlier materials are also listed. (GC)