Bibliography

     Mims, F. (2000) Science and Communication Circuits and Projects. US, First Printing Press.

     Hill, J. and Hill J. (1986) Looking At Light and Colour. London, B.T. Batsford

     Hirsh, A. (1991) Physics, a Practical Approach. Toronto, John Wiley and Sons Canada Limited   

                                                                                                                                                                                                           Silverberg R. (1967) Light for the World, Edison and the Power Industry. Toronto, D. Van Nostrand Company.

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