Discoveries by Yrjö Väisälä
= Discoveries by Yrjö Väisälä
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"Discoveries" by Yrjö Väisälä is a significant work published in 1955 that outlines the contributions and findings of the Finnish astronomer and physicist Yrjö Väisälä. He is known for his extensive work in the field of astronomy, particularly in observational astronomy and photometry, as well as the development of astronomical instruments.