著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL
"Heyboer, J. P. and Zijlstra, P.","Transmitting valves : the use of pentodes, tetrodes and triodes in transmitter circuits",,N.V. Philips' Gloeilampenfabrieken,1951,Philips technical library,,,,https://cir.nii.ac.jp/crid/1130000795386331136