Maxwell’s RDA

Maxwell’s Handbook for RDA, Resource Description & Access – Explaining and Illustrating RDA: Resource Description and Access Using MARC21 By Maxwell, Robert L. – 2013

Programmers and analysts who are working on library catalog systems will find this reference useful, though a searchable electronic version might be more useful. The preface and introduction will get you started in a way that no google search can match. Read all 850 pages to get an expert understanding of the subject with no gaps.