Publishing

Association of American Publishers [some data available by purchase only]
http://www.publishers.org/
Publisher: Association of American Publishers

Audio Publishers Association
http://www.audiopub.org/i4a/pages/index.cfm?pageid=1
Publisher: Audio Publishers Association

Best Seller Lists 1900-1995
http://www.caderbooks.com/bestintro.html
Publisher: Cader Company Inc

Best Sellers
http://www.nytimes.com/pages/books/bestseller/index.html
Publisher: New York Times

Best Selling Books Database
http://asp.usatoday.com/life/books/booksdatabase/default.aspx
Publisher: USA Today

Book Industry Study Group
http://www.bisg.org/
Publisher: Book Industry Study Group

Bookwire
http://www.bookwire.com/
Publisher: Bowker

International Digital Publishing Forum [e-book statistics]
http://www.idpf.org/
Publisher: International Digital Publishing Forum

International Publishers Association
http://www.ipa-uie.org/
Publisher: International Publishers Association

Magazine Publishers of America
http://www.magazine.org/research/
Publisher: Magazine Publishers of America

Newspaper Association of America/Research [some data for members only]
http://www.naa.org/
Publisher: Newspaper Association of America

Nielsen BookScan Australia [some data for subscribers only]
http://www.nielsenbookscan.com.au/index.html
Publisher: Nielsen Entertainment

Publishers Weekly
http://www.publishersweekly.com/
Publisher: Publishers Weekly

Publishing Central
http://www.publishingcentral.com/
Publisher: PublishingCentral.com