@article{oai:repository.dl.itc.u-tokyo.ac.jp:00024196, author = {高木, 昇 and 中川, 隆}, issue = {7}, journal = {生産研究}, month = {Jul}, note = {application/pdf}, pages = {186--188}, title = {商用周波数の精密測定}, volume = {6}, year = {1954} }