@misc{oai:repository.dl.itc.u-tokyo.ac.jp:00046117,
 author = {久永, 正治},
 month = {},
 note = {種別: 実習報告},
 title = {Ashio copper smelting works（足尾銅山冶金報告（本文1冊、附図1冊））． 足尾銅山．},
 year = {1903}
}