The following are all recommended
Luis Milán on Sixteenth-Century Performance Practice by Luis Gásser, Indiana University Press, 1996
An essential guide to the life and work of the first published Spanish vihuelist. Chapter headings include:
Biography of Milán; Milán's religious beliefs; Naples; El Cortesano (a novel by Milán including descriptions of his own performances); Modality; Meter, tactus and time signature; Text setting; Ornamentation; Songs; Fantasías: style and structure; Tuning and Temperament, etc.
Luis de Milan, El Maestro - Translated, Transcribed and Edited by Charles Jacobs, The Pennsylvania State University Press, 1971
Includes a translation into English of Milán's introduction, and a transcription (treble and bass clefs) of all the songs and solos.
Miguel de Fuenllana, Orphénica Lyra (Seville, 1554), Edited by Charles Jacobs, Oxford University Press, 1978
Includes a biography, transcriptions of all songs and solos, and translation into English of Fuenllana's own introduction.
CD-ROM Libros de Música para Vihuela 1536-1576
Facsimile Collection of all seven published books for
the vihuela in one CD-ROM Booklet in Spanish.
I- Milan's Libro de Música II- Narváez's Seys libros del Delphín III- Mudarra's Tres Libros de Música IV- Valderrábano's Silva de Sirenas V- Pisador's Libro de Música para Vihuela VI- Fuenllana's Orphénica Lyra VII- Daza's El Parnasso - available from The Lute Society in England and LACG in the USA.
Neapolitan Lute Music, Fabris and Griffiths
Madison: A-R Editions, 2004. Discusses the lute music of Dentice and Severino (the latter is thought to have played the viola da mano or vihuela).