@article{oai:repository.dl.itc.u-tokyo.ac.jp:00032344, author = {坪井, 忠二}, issue = {3}, journal = {地震研究所彙報別冊}, month = {Oct}, pages = {125--127}, title = {Gravity Survey along the Lines of Precise Levels throughout Japan by Means of a Worden Gravimeter. : Part 4. Map of Bouguer Anomaly Distribution in Japan Based on Approximately 4,500 Measurements}, volume = {4}, year = {1954} }