1. Design and interpretability of road signs;Brainard;Journal of Applied Psychology,1961
2. Symbol design and testing methodology project: A proposed testing methodology for public information symbols;Cairney;Flinders University, Centre for Applied Social and Survey Research, Technical Paper No. 3,1979
3. Symbol Source Book;Dreyfus,1972
4. Safety labelling and consumer products: Field studies of sign recignition;Easterby;University of Aston in Birmingham, Applied Psychology Department, AP Report 76,1977
5. Rapid comprehension of verbal and symbolic traffic sign messages;Ells;Human Factors,1979