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Paper: Exploiting Four Historical Ca II K Spectroheliogram Archives
Volume: 504, Coimbra Solar Physics Meeting: Ground-based Solar Observations in the Space Instrumentation Era
Page: 227
Authors: Chatzistergos, T.; Ermolli, I.; Solanki, S. K.; Krivova, N. A.
Abstract: Here we briefly review the status of the project aimed to analyse the potential of historical Ca II K archives for studies of long-term (decades to a century) solar variability.
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