Reference Universe is a database providing researchers with comprehensive scholarly, authoritative introductions using your library's own specialized reference collection.
Data: 35 million citations.
19th Century Masterfile
19th Century Masterfile is a database offering researchers primary source analysis in Humanities, Engineering, History of Science, Legal Studies, the Arts, and more.
Data: 27 million citations.
U.S. Documents Masterfile
U.S. Documents Masterfile is a resource for the study of United States documents, publications, and federally-funded research reports from 1774 to the present day.
Data: 15 million citations.
“The Entire Collection Could Have Been Held by a Four-Shelf Bookcase”: Dr. John Shaw Billings and the Surgeon General Office’s Library
We recently augmented 19th Century Masterfile with data from the Index-Catalogue of the Library of the Surgeon-General’s Office. This index—and the library that spawned it—were (read more)
Over the last nine months, we have made some exciting new changes to U.S. Documents Masterfile. Searches have been streamlined and more options added, the site layout refined, and metadata cleaned to (read more)