@article{oai:nipr.repo.nii.ac.jp:00002388, author = {Ito, Hajime}, journal = {Memoirs of National Institute of Polar Research. Special issue}, month = {Mar}, note = {P(論文), The necessity to carry out observations in the Greenland Sea in winter is emphasized, and the background which makes such observations so important is described. Recent efforts are reported.}, pages = {337--341}, title = {Greenland Sea in winter (report)}, volume = {54}, year = {2001} }