16 Paper, cardboard and goods made from these materials, namely, paper and cardboard boxes; printed publications, namely, journals, books, brochures, books, pamphlets, prospectuses, manuals, teaching aids in the nature of printed teaching materials, magazines, printed periodicals, almanacs, guide books, leaflets, printed reports, commemorative books, books, souvenir programs, catalogues, printed instruction and teaching materials, all in the field of electric energy generation, production, distribution, sales and legal, managerial and economic issues related to it; indexes, namely, index books; diagrams for displaying information relating to electric energy generation, production, distribution, sales and legal, managerial and economic issues related to it; charts for displaying data regarding electric energy generation, production, distribution, sales and legal, managerial and economic issues related to it; photo albums; folders; printed guides for events related to electric energy generation, production, distribution, sales and legal, managerial and economic issues related to it; note books, calendars, bookmarks, stationery folders, bookbindings, folders for papers, loose-leaf binders; office requisites, namely, staplers, and rubber bands; stationery; printed matter, namely, printed forms, business forms, photographs, graphic art prints, graphic art reproductions, paper tags, and posters; ink stamps; shields in the nature of stationery seals