@article{oai:nipr.repo.nii.ac.jp:00004126, journal = {Proceedings of the NIPR Symposium on Upper Atmosphere Physics}, month = {May}, note = {S(会告など)}, pages = {77--79}, title = {Program of Fourteenth Symposium on Coordinated Observations of the Ionosphere and the Magnetosphere in the Polar Regions held at the National Institute of Polar Research, Tokyo, January 22-23, 1991}, volume = {5}, year = {1992} }