The Colonial Music Institute (compiled by Robert M. Keller, Raoul F. Camus, Kate Van Winkle Keller, and Susan Cifaldi): Early American Secular Music and Its 
European Sources, 1589–1839: An Index — This is a series of indexes derived from a data base of musical information compiled from primary sources covering the 250 years of the initial exploration and settlement of the United States. It consists of over 75,000 entries that are sorted by text (titles, first lines, recitatives, chorus and burden), by music incipits (represented in scale degrees, stressed notes and interval sequences), with additional indexes of names and theater works.