Sources
The data on this site has been aggregated from the following collections of guitar music and articles.
Boije Collection
Musik- och Teaterbiblioteket (Music and Theatre Library of Sweden)
The Etude
Sophocles Papas and George Krick articles 1930-1943
Freien Vereinigung zur Förderung guter Guitaremusik Augsburg
Stadtbücherei Augsburg
GFA Archive
GFA Online Archive of digitized scores
Gitarristische Sammlung Fritz Walter und Gabriele Wiedemann
Bayerische Staatsbibliothek
Gitarristisches Archiv
Münchner Stadtbibliothek
Historic Sheet Music Collection, 1800-1922
Library of Congress
Hudleston Collection
Royal Irish Academy of Music
George C. Krick Collection (Colorado)
American Music Research Center, University of Colorado at Boulder
George C. Krick Archive (Missouri)
Gaylord Music Library, Washington University, St. Louis
The Lester S. Levy Sheet Music Collection
Johns Hopkins Sheridan Libraries
Music for the Nation: American Sheet Music, ca. 1820 to 1860
Library of Congress
Music for the Nation: American Sheet Music, ca. 1870 to 1885
Library of Congress
Luigi Ricca Collection
Biblioteca comunale Luigi Ricca - Comune di Codogno
Nakano Collection
Doshisha University
Catalogo Numerico Ricordi
Archivio Storico Ricordi Collezione Digitale
Rischel & Birket-Smith Collection
Det Kongelige Bibliotek (The Royal Library of Denmark)
Scheit Archive
Universität für Musik und Darstellende Kunst, Vienna
Link for information from Stefan Hackl
Conservatorio Superior de Musica Manuel Castillo
Conservatorio Superior de Musica Manuel Castillo Biblioteca
Guitar and Lute Issues, Matanya Ophee
Kenneth Sparr Collection
The Collection of Kenneth Sparr
Mary Belle Swingle Collection
Yale University Library
Vorhauer Collection
The Collection of Robert Coldwell