Source Publication (e.g., journal title)
JUDGING FROM THE size of their booths, the number of activities sponsored, and the glitz of their parties at the Special Libraries Association (SLA) 2001 annual meeting in San Antonio, Lexis-Nexis, Factiva (Dow Jones/Reuters), and Dialog are still the big three for special librarians. In fact, all three lead in online system revenues. These mainstays in special libraries fiercely compete with each other, but none can afford to take its position for granted--witness Dialog's recent slip from market leader to number three.
Tenopir, Carol, "Still the Big Three in Special Libraries: Dialog, Factiva, and LexisNexis" (2001). School of Information Sciences -- Faculty Publications and Other Works.