stationery, informational letters, circulars, periodicals, journals, newsletters and informational flyers relating to clinical pathology and the testing and analysis of human and veterinary pathology specimens; publications, namely, brochures, booklets, pamphlets, teaching materials, periodicals, and journals in the field of human and veterinary pathology and related scientific areas; manuals, journals, information circulars, and newsletters relating to the education of veterinarian and health professionals