@misc{oai:repository.dl.itc.u-tokyo.ac.jp:00011304,
 author = {長谷川, 敬三},
 month = {},
 note = {種別:卒業論文},
 title = {A Short study on Comparison of A．C． Single Phase Commutator Motor with Poly-Phase Induction Motor for Railway Service},
 year = {1906}
}