@article{oai:jaxa.repo.nii.ac.jp:00024991,
 author = {渡部, 潤一 and 阿部, 琢美 and Watanabe, Jun-Ichi and Abe, Takumi},
 issue = {2},
 journal = {Earth, Moon, and Planets},
 month = {},
 note = {資料番号: SA1001692000},
 pages = {141--147},
 title = {Periodic activity of Comet Bradfield 1987s},
 volume = {44},
 year = {1989}
}