found: Work cat.: Underground digest [MF] vol. 1, no. 2.
found: Real free press illustratie [MF] Nov. 1968.
found: The mile high underground [MF] summer 1967.
found: The American Heritage dictionary of the English language, via WWW, Aug. 13, 2003(zine, also 'zine : An inexpensively produced, self-published, underground publication)
found: The book of zines website, viewed Aug. 13, 2003:what's a zine? (Zines (pronounced "zeens," from fanzines) are cut-and-paste, "sorry this is late," self-published magazines reproduced at Kinko's or on the sly at work and distributed through mail order and word of mouth; underground publishers)
found: Alternative press index home page, Aug. 13, 2003(quarterly subject index to over 250 alternative, radical and left periodicals, newspapers and magazines)
found: LC database, Aug. 13, 2003(progressive periodicals; zines; alternative periodicals; underground, revolutionary, radical, and other alternative serials; periódicos insurgentes; périodiques clandestins; journaux cladestins)
found: Google search, Aug. 13, 2003(143 hits on "underground periodicals"; 538 hits on "alternative periodicals"; 775,000 hits on "zines")