Studies on Al2O3 used for Radio Recieviug Tubes
真空管用アルミナに関する研究

Hiroshi YAMAMOTO, Takashi WARAYA, Shuyo ITO
1953 Journal of the Ceramic Association Japan  
doi:10.2109/jcersj1950.61.687_419 fatcat:xq3zzrcrevcohgscd6mo56z35q