A photometric study of activations of prominences probably due to moving disturbances on the sun /

Autor Öhman, Yngve, 1903-1988, Lindgren, Agi, Lindgren, Ulla
Vydáno 1962

On some suggested procedures to reduce the scattered light in sunspot photometry /

Autor Öhman, Yngve, 1903-1988
Vydáno 1966

Spectrographic observations of dark surges and mottles at the solar limb /

Autor Öhman, Yngve, 1903-1988
Vydáno 1966

On some observations of sunspots using shearing interference of the diffraction image /

Autor Öhman, Yngve, 1903-1988
Vydáno 1966