Source Publication (e.g., journal title)
Continual pressures-including competition from free web search engines, the escalating costs of keeping up with human-based indexing of proliferating journal articles, and customer desires for online system interconnections and bells and whistles-have arguably made this past ten years more challenging than the 90 before. Matthew J. Toussant, CAS senior VP of editorial operations, notes that "patents are now the leading source of new substance information in the CAS REGISTRY database and accounted for 63 percent of new substance records by CAS in 2006."
Tenopir, Carol. “Celebrating A&I Longevity,” Library Journal 132 (November 1, 2007).