Plage area composite series
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资源简介：
VizieR online Data Catalogue associated with article published in journal Astronomy & Astrophysics with title 'Analysis of full disc Ca II K spectroheliograms. II. Towards an accurate assessment of long-term variations in plage areas.' (bibcode: 2019A&A...625A..69C)
创建时间：
2019-09-21
