@article{oai:nipr.repo.nii.ac.jp:00002201,
 author = {Watanabe, Okitsugu},
 journal = {Memoirs of National Institute of Polar Research. Special issue},
 month = {Mar},
 note = {P(論文)},
 title = {Preface},
 volume = {49},
 year = {1994}
}