to some excellent European resources that might not otherwise be available to libraries with less than comprehensive collections." RME’s titles stem from different periods and countries: The earliest, Jean-Jacques Rousseau’s Dictionnaire de musique, was published in 1775. There is also the first edition of "The Grove," in an edition published by Theodore Presser in 1895. The largest amount of titles date from 2000 onward. Among them are Ken Bloom's Broadway, Lol Henderson and Lee Stacey's Encyclopedia of Music in the 20th Century, Peter Matzke et al., Das Gothic- und Dark Wave-Lexikon, and Richard Kostelanetz's Dictionary of the Avant-Gardes. The comprehensive Handwörterbuch der musikalischen Terminologie, conceived between 1972 bis 2006, is also included. RME holds important titles for ethnomusicologists, among them The Garland Encyclopedia of World Music and Eileen Southern's Biographical Dictionary of Afro-American and African Musicians, which is the first single comprehensive volume of its kind. The collection expands annually with additions of four titles in average. One of the titles, Komponisten der Gegenwart (KDG), is being regularly updated with new articles or additions to existing articles.Hanns-Werner Heister, "Paper is Patient: The Loose-Leaf Lexicon Komponisten der Gegenwart and the Digital Future," Fontes Artis Musicae 63, no. 3 (2016): 209. Index to Printed Music On 1 July 2018, RILM assumed ownership of IPM. Previously, it was owned by the James Adrian Music Company, which was founded in 2000 by George R. Hill. The Index to Printed Music (IPM) is the only digital finding aid for searching specific musical works contained in printed collections, sets, and series. It indexes individual pieces of music printed in the complete works of composers, in anthologies containing pieces from disparate historical periods, and in other scholarly editions. It provides a granular level of detail about each piece, including performing forces, language, multiple clefs or figured bass, and more. IPM includes the complete contents of Collected Editions, Historical Series & Sets & Monuments of Music: A Bibliography, by George R. Hill and Norris L. Stephens (Berkeley: Fallen Leaf Press, 1997), which, in turn, was based upon Anna H. Heyer's Historical Sets, Collected Editions, and Monuments of Music: A Guide to Their Contents (American Library Association, 1957–1980). Since 2019 IPM offers new features, among them biographical facts identifying composers, editors, and lyricists; hyperlinks to open-access editions; music incipits for works that are otherwise difficult to distinguish from each other; easy toggling between collections and the individual works contained