@article{oai:repository.dl.itc.u-tokyo.ac.jp:00033526,
 author = {Matumoto, Hideteru},
 issue = {4},
 journal = {東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo},
 month = {Mar},
 note = {application/pdf},
 pages = {1435--1442},
 title = {Automatic Step-wise Gain Control of a Seismometer Amplifier for the Routine Observation of Small Earthquakes},
 volume = {44},
 year = {1967}
}