Coronal Holes According to Chromospheric Observations von Baranovskii, E. A., Gopasyuk, O. S., Shtertser, N. I.

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Methodical problems of magnetic field measurements in umbra of sunspots von Lozitska, N.I., Lozitsky, V.G., Andryeyeva, O.A., Akhtemov, Z.S., Malashchuk, V.M., Perebeynos, V.A., Stepanyan, N.N., Shtertser, N.I.

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Physical Conditions in Coronal Holes von Gopasyuk, O. S., Baranovskii, E. A., Tarashchuk, V. P., Shtertser, N. I.

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Polar coronal holes in the solar activity cycle von Stepanian, N.N., Shtertser, N.I.

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