1990 Britannica book of the year / edited by Daphne Daume. - Chicago, ILL. : Encyclopaedia Britannica, c1990. - 926 p. : p., ill. (some col.), maps, ports. ; 29 cm. Includes index. Also includes "1990 Britannica world data." ISBN: 0852295227 ISSN: 0068-1156 LCCN: 38012082 Subjects--Topical Terms: Encyclopedias and dictionaries.