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Spectrum, volume 06, number 18 (1979)382

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SpectrumV6No18.pdf2

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United States134
South Korea103
Germany22
China12
United Kingdom3
Japan3
Ukraine3
Denmark2
France2
Belarus1

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Seoul97
Sunnyvale30
Washington14
Kiez12
Mountain View8
Columbia7
Valley Stream4
Cupertino3
Dallas3
Egham3