16 Printed educational publications, namely, teaching and instruction manuals in the field of in the field of economics, business, management, marketing, administration, research, leadership, and human resources; printed books in the field of economics, business, management, marketing, administration, research, leadership, and human resources; printed publications, namely, books, pamphlets, brochures, and magazines, in the field of economics, business, management, marketing, administration, research, leadership, and human resources; printed educational, instructional, and teaching materials in the field of economics, business, management, marketing, administration, research, leadership, and human resources