16 PRINTED MATTER, NAMELY, SINGLE BOOKS, MAGAZINES AND NEWSPAPERS, JOURNALS, ALL THESE PRODUCTS BEING IN THE FIELD OF BUSINESS MANAGEMENT; PAPER AND CARDBOARD FOR STATIONERY OR PRINTING, PAPER AND CARDBOARD BOXES, CARDBOARD, PACKING PAPERS, BAGS OF PAPER OR PLASTIC FOR PACKAGING; ENVELOPE BAGS OF PAPER OR CARDBOARD FOR PACKAGING, SIGNBOARDS OF PAPER OR CARDBOARD, PLACARDS OF PAPER OR CARDBOARD; POSTERS, PICTURES; PHOTOGRAPH ALBUMS, WRITING PADS, WRITING OR DRAWING BOOKS, LEDGERS, NOTEBOOKS, DOCUMENT FILES, ANNOUNCEMENT CARDS, INDEX BOOKS AND CARDS, LETTER FILES, PAPER KNIVES; LETTER TRAYS, WRITING INSTRUMENTS, NAMELY, PENS, PENCILS, PLASTIC AND PAPER BUBBLE WRAP FOR PACKING; PLAYING CARDS; POSTCARDS; WRITING PAPER; INSTRUCTIONAL, EDUCATIONAL AND TEACHING MATERIALS IN THE FIELD OF BUSINESS MANAGEMENT