1. A sonar fish counter;Braithwaite;Journal of Fish Biology,1971
2. A high resolution electronic sector scanning sonar;Welsby;Journal of British Institution of Radio Engineers,1963
3. Measurements of the effect of air bubbles on the speed of sound in water;Gibson;Journal of the Acoustical Society of America,1970
4. An investigation into the design and performance of electric fish screens and an electric fish counter;Lethlean;Transactions of the Royal Society Edinburgh,1951