Reconstruction of the Sunspot Group Number: The Backbone Method
Crossref DOI link: https://doi.org/10.1007/s11207-015-0815-8
Published Online: 2016-02-18
Published Print: 2016-11
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Svalgaard, Leif
Schatten, Kenneth H.
Text and Data Mining valid from 2016-02-18