Osborne Enterprises and Jellyroll Productions  
   Producer of price guides (in the "Official Price Guide" series) and reference books for music collectibles. General descriptions of each volume.
   http://www.jerryosborne.com/

All Music Guide  
   Comprehensive guide to recordings in every genre. Cross-indexed source of reviews, essays, and ratings; all available online, on in-store kiosks, and in print form. Uses submissions from readers.
   http://www.allmusic.com/

Muze  
   Longtime publisher (over 50 years) of directories of recorded music for retail stores; their data is now available for purchase to place on other websites and in-store kiosks.
   http://www.muze.com/

Joel Whitburn's Record Research Books  
   Information from Billboard magazine's major charts with complete chart data on every recording ever charted. Short descriptions and sample pages from this large line of books.
   http://www.recordresearch.com/

Rough Guides  
   Over 30 music guidebook titles; features online versions of their Rock, World, and Classical guides.
   http://www-2.roughguides.com/music/

RecordResearcher.com  
   CD-ROM discography RockRom 8, and book Rock Record 7, with 500,000 records, over a million tracks and musicians. Free sofwared demo download.
   http://www.recordresearcher.com/

Hot Wacks Press  
   Publisher of guides to bootleg records and CDs. Information about the books, and three articles about bootlegs (recordings of live music of questionable legality).
   http://log.on.ca/hotwacks/

Gramophone Classical Good CD Guide  
   Brief description of the guidebook to classical music.
   http://www.gramophone.co.uk/publications_detail.asp?pub=2

Trouser Press  
   Official site of Trouser Press magazine (1974-1984) and the Trouser Press Record Guides. Reviews and discographies from five editions of the guidebook.
   http://www.trouserpress.com/

Krause Publications  
   Publisher of several record and CD collecting related books, including price guides.
   http://www.krause.com/static/records.htm