About HIRABAYASHI KATSUHIKO
About 電電公社茨城電通研
About KOZAWAGUCHI HARUKI
About 電電公社茨城電通研
About TSUJIYAMA BUNJIRO
About 電電公社茨城電通研
About 電子通信学会技術研究報告
About electroluminescence
About Luminescence of semiconductors
About Light emitting devices
About EL
About 空孔