http://users.knoware.nl/~jsmeets/cgi-bin/ccd.cgi?comp=sweelinc Classical Composers Database entry with comments on the popularity and availability of his keyboard and vocal compositions including work on the Geneva Psalter. http://www.karadar.net/Dictionary/sweelinck.html Musica Classica Classical Music Dictionary entry with life, works, portrait, and MIDI audio file. http://encarta.msn.com/index/conciseindex/10/010A4000.htm?z=1&pg=2&br=1 Concise Encarta Encyclopedia article focusing on keyboard compositions and teaching. http://stevenestrella.com/composers/composerfiles/sweelinck1621.html Biographical data, recommended CDs, books and sheet music, bibliography, and link to biographical essay from Dr. Estrella's Incredibly Abridged Dictionary of Composers.