@article{oai:repository.dl.itc.u-tokyo.ac.jp:00033548,
 author = {Hirasawa, Tomowo},
 issue = {3},
 journal = {東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo},
 month = {Jan},
 note = {application/pdf},
 pages = {901--918},
 title = {A Least Squares Method for the Focal Mechanism Determination from S Wave Data : Part I},
 volume = {44},
 year = {1967}
}