This series contains research compiled largely for the Commission's Resource Center for research in reference. The research consists of scholarly articles and papers, U.S. congressional reports and legislation, correspondence, memoranda, and governmental reports compiled by Commission staff regarding territories that sought admission as states. The majority of the research focuses on efforts in Alaska, Hawaii, and Puerto Rico to achieve statehood. The series also contains research focusing generally on statehood and research strategies for the Commission to undertake. Folders are arranged alphabetically by subject or state and then chronologically.