An Early Sunspot Catalog by Miguel Aguilar for the Period 1914 – 1920
Crossref DOI link: https://doi.org/10.1007/s11207-016-0905-2
Published Online: 2016-06-06
Published Print: 2016-11
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Lefèvre, L.
Aparicio, A. J. P.
Gallego, M. C.
Vaquero, J. M.
License valid from 2016-06-06