Dance Education Literature and Research Description Index This link opens in a new windowThe Dance Education Literature and Research descriptive index (DELRdi) is an index of literature and research from 1926 to the present that informs teaching, learning, and future directions of research in the field of dance education. It contains extensive descriptions of several thousand literary works including theses, dissertations, journal articles, conference proceedings and other documents from over 200+ different publications, more than 150 university dance programs, many organizations, government agencies, and individuals.