In 1967 the University of Toronto School of Library Science held a two-day colloquium on the Anglo-American Cataloging Rules, the first public discussion of the new cataloguing code. This volume contains the proceedings and discussions of that meeting. It is a useful work for librarians at all levels, giving the background to the new cataloguing rules, the intentions of the Library of Congress about implementation, and some detailed suggestions for their use by the various categories of libraries.