16 Printed matter, namely, written articles and publications, namely, books, booklets, hand-outs, workbooks, magazines, journals, periodicals, brochures and leaflets in the fields of science, medicine, veterinary medicine, pharmacology and drug development; printed periodicals in the field of science, drug development and medicine; books in the fields of science, medicine, veterinary medicine, pharmacology and drug development; stationery; printed promotional, instructional, teaching and informational materials, namely, books, booklets, hand-outs, workbooks, magazines, journals, periodicals, brochures and leaflets in the fields of science, medicine, veterinary medicine, pharmacology and drug development