From the Society of Vertebrate Paleontology this covers the indexed published literature of vertebrate paleontology from 1509-1993. "The BFV Online provides interactive access to the SVP's 'Bibliography of Fossil Vertebrates' series. Using the BFV Online, users can specify a search criterion, and receive a formatted list of matching literature references. Results will appear in a new window (users that have activated pop-up blocking in their browser may need to adjust their settings for this to work properly). Queries are formed like taxon = 'Tyrannosaurus'. Detailed instructions are available for writing queries, including complex Boolean statements and the use of pattern-matching."