Journal of communications technology and electronics
12
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New York : John Wiley,
1956
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| Online Access: | http://www.metapress.com/content/119882/?p=1233e63daadb45f999680a8470f75836&pi=0 http://www.springerlink.com/content/119882/?p=797b80f62cdf48a193a432c5674dc81b&pi=0 |