The Solar Cycle: Proceedings of the National Solar Observatory/Sacramento Peak 12th Summer Workshop and of the Fourth in Series of Solar Cycle Workshops Held at Nso/Sacramento Peak, 15-18 October 1991
The Solar Cycle: Proceedings of the National Solar Observatory/Sacramento Peak 12th Summer Workshop and of the Fourth in Series of Solar Cycle Workshops Held at Nso/Sacramento Peak, 15-18 October 1991