ProQuest Dissertations and Theses is the seminal repository of intellectual property and emerging research from the world’s great universities. Chosen by the United States Library of Congress as the official archive of American dissertations, ProQuest Dissertations & Theses, whose precursor was begun in 1939, now encompasses more than one-quarter of a billion pages, creating a unique, continually growing trove of emerging research and landmark works. Researchers rely on ProQuest Dissertations & Theses as both a source of enlightening information and as a pivotal component in making their own scholarly production available to the world’s intellectual communities.