In a method for providing a self-administered survey using a bar coded survey questionnaire having a plurality of survey questions and a plurality of selectable responses to the questions, with the selectable bar coded responses (10) being scannable for storing the selected responses (10); the improvement...http://www.google.co.uk/patents/US4954699?utm_source=gb-gplus-sharePatent US4954699 - Self-administered survey questionnaire and method
