1. Systematised Nomenclature of Pathology;of American Pathologists, College,1965
2. Newapproach to information handling in general practice;Harden, K.A.; Harden, R.McG; Reekie, D.;Brit. med. J,1974
3. Indexing audio visual aids on a feature card system;Harden, R.McG;Med. biol. Iii,1968
4. Punched feature cards;Jolley, J.L.;Data Processing,1959
5. Establishing a feature card index;Lawson, J.I.M.; Shearer, W.M.;Anaesthesia,1968