Litinskiĭ, V. M., Kharin, E. P., & Semenov, V. ︠. (1992). Hourly indices of geomagnetic activity for the middle latitudes: Catalogue 1964-1991. Geophysical Committee, Russian Academy of Sciences.
Chicago-viite (17. p.)Litinskiĭ, V. M., E. P. Kharin, ja V. ︠I︡U Semenov. Hourly Indices of Geomagnetic Activity for the Middle Latitudes: Catalogue 1964-1991. Moscow: Geophysical Committee, Russian Academy of Sciences, 1992.
MLA-viite (8. p.)Litinskiĭ, V. M., et al. Hourly Indices of Geomagnetic Activity for the Middle Latitudes: Catalogue 1964-1991. Geophysical Committee, Russian Academy of Sciences, 1992.
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