Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
YONEZAWA T.,On the seasonal and non-seasonal annual variations and the semi-annual variation in the noon and midnight electron densities of the F_2 layer in middle latitudes,J. Radio Res. Labs,,,1959,6,,293-309,https://cir.nii.ac.jp/crid/1574231873823814016,