1. Assessing the readability of health education messages;Freimuth;Public Health Rep,1979
2. Are condom instructions readable? Results of a readability study;Richwald;Public Health Rep,1988
3. Assessing readability;Klare;Reach Res Q,1974/1975
4. Fry's Readability Graph Clarifications, Validity, and Extension to Level 17;Fry;J Read,1977
5. A formula for predicting readability: instructions;Dale;Educ Res Bull,1948