Dagobert Soergel Information Representation and Retrieval in the Digital Age (ASIST Monograph Series) by Heting Chu, Medford, NJ: Information Today; 2003, 248 p, ISBN 1-57387-172-9. 111-112 2006 9 Inf. Retr. 1 http://dx.doi.org/10.1007/s10791-005-5724-2 db/journals/ir/ir9.html#Soergel06