TY - BOOK AU - Fuhrmann,A. AU - Morreau,M. TI - The logic of theory change: Workshop, Konstanz, FRG, October 13-15, 1989 : proceedings SN - 3540535675 AV - QA76.6 L65 PY - 1991/// CY - Berlin PB - Springer-Verlag KW - Logic programming KW - Addresses, essays, lectures ER -