Cataloging Theory and History

I've been reading a book which should be required reading in all cataloging classes and history of librarianship classes, Seymour Lubetzky: Writings on the Classical Art of Cataloging edited by Svenonius and McGarry. Most working catalogers would also benefit from reading at least some of these writings by a person who was involved in shaping cataloging rules for the latter half of the century. His thought is clear and his writing direct. Anyone interested in the reason for cataloging, main entry, form of entry for names and titles, and the ideological history of bibliographic control would benefit form this book. Highly recommended.