@article{oai:repository.dl.itc.u-tokyo.ac.jp:00023923, author = {原, 善四郎}, issue = {5}, journal = {生産研究}, month = {May}, note = {application/pdf}, pages = {240--240}, title = {研究速報 : 鉄鉱石の被還元性を表示する試み}, volume = {8}, year = {1956} }