Surface chemistry of silica and related sorbents 12 - 8 20M20 8 UDC 004.62 8 ALC 7 УДК 004.62 7 дескриптивна логіка 7 20M10 6 description logic 6 Related Topics 5 UDC 004.94 5 active 5 arrays 5 deductive 5 distributed 5 general relativity 5 moving objects 5 multidimensional 5 navigational 5 network 5 parallel 5 relational 5 spatial 5 spatio-network 5 spatio-temporal 5 statistical 5 temporal 5 УДК 004.94 5 16S35 4 20M30 4