Ullmann's Encyclopedia of Industrial Chemistry, Fifth Editionon CD-ROM Edited by H. Arpe et al. (Hoechst Aktiengesellschaft).Wiley-VCH: Weinheim, Germany. 1997. $14300.00 (CD version);$16450 (both the print and CD versions). Annual updates of theCD version will be available for approximately $1150. ISBN 3-527-20159-9.