ABAA:  Antiquarian Booksellers' Association of America, with information for book collectors and the antiquarian book trade.  You may search for a book, look for upcoming bookfairs, subscribe to the ABAA Newsletter and learn more about the Association.
	ILAB:  The International League of Antiquarian Booksellers, a federation of twenty national associations of booksellers, offers news on antiquarian books and the antiquarian trade, book collecting resources, a glossary of terms as well as book offerings by ILAB members.
	RBS:  Founded in 1983 and since 1993 based at the University of Virginia in Charlottesville, Rare Book School (RBS) offers a variety of five-day non-credit courses related to antiquarian books and manuscripts, on subjects ranging from medieval paleography to modern fine printing.
	viaLibri:  viaLibri, Resources for Bibliophiles, searches eleven book sites for antiquarian titles, offers a library search, and features on-line catalogues.
	RBMS: The Rare Books and Manuscript Section of the American Library Association has on-line "Your Old Books", a brochure written in consultation with the ABAA.  "Your Old Books" answers frequently asked questions regarding antiquarian books.

Library of Congress:  The Library of Congress website offers information on the Library's current exhibitions, its catalogues as well as a gateway to other library catalogues, and web broadcasts.  Its vast digital project, American Memory, is a resource for images and descriptions of maps, photographs, documents, and audio recordings documenting American culture and history.