41 EDUCATIONAL SERVICES; NAMELY, PUBLICATION OF TEXTBOOKS AND REFERENCE MATERIALS FOR USE IN THE ACADEMIC FIELD, EXCLUDING ON-LINE PUBLISHING OF BOOKS AND MAGAZINES; LENDING LIBRARIES; RENTAL OF FILMS, VIDEOS AND AUDIO RECORDINGS FOR ACADEMIC PURPOSES; ARRANGING AND CONDUCTING OF EDUCATIONAL COLLOQUIUMS, CONFERENCES AND CONGRESSES; AND ORGANIZATION OF EXHIBITIONS FOR EDUCATIONAL PURPOSES