@article{oai:nipr.repo.nii.ac.jp:00002256,
 author = {Berkman, Paul Arthur and Yoshida, Yoshio},
 journal = {Memoirs of National Institute of Polar Research. Special issue},
 month = {Aug},
 note = {P(論文)},
 pages = {iii--vi},
 title = {Foreword},
 volume = {50},
 year = {1994}
}