References
- The Bible , Proverbs , 29 : 18 .
- Hayes , John R. , “The Mental Concept of Invention,” Journal of the Patent Office Society , Vol. XVII , No. 12 , December 1935 , 948 – 961 .
- Gilfillan , S. C. , “The Prediction of Invention,” Journal of the Patent Office Society , September 1937 , 623 – 645 .
- Rogers , Eric M. , Physics for the Inquiring Mind , Princeton , N.J. , Princeton University Press , 1960 , pp. 342 – 343 .
- Whitehead , Alfred North , The Aims of Education , A Mentor Book , Published by The New American Library , p. 13 .
- Bryson , Lyman , Editor, An Outline of Man's Knowledge of the Modern World , New York , McGraw Hill , 1960 , p. 240 .