REFERENCES
- SINGLETON , W. T. , EASTERBY , R. S. , and WHITFIELD , D. , 1967 , Proceedings of the Conference on ‘ The Human Operator in Complex Systems ’ ( London TAYLOR AND FRANCIS LTD. ).
- SINGLETON , W. T. , and EASTERBY , R. S. , 1967 , The philosophy of block diagrams ( awaiting publication ).