The eleventh annual publication, this volume reviews 546 titles chosen by the editor as the most valuable reference titles published during 1990. "Recommended Reference Books" allows librarians to locate new works in a given field through its convenient subject arrangement; consult other published reviews from the citations provided; and compare price, scope and coverage of reference books in a particular subject area. The lengthy signed reviews are coded C, P and S to offer guidance for college, public and school libraries.