The Finnish Radio-Sound and Its Use : Commentationes physico-mathematicae 9 - Academic paper by the founder of Vaisala Oyj
38: Societas Scientiarum Fennica, 1937. 1st Edition. Soft cover. In English. Vilho Väisälä (1889-1969) was a Finnish meteorologist and physicist, and founder of Vaisala Oyj. 28 pp plus an attached chart. Covers have tears and small pieces missing. Pages uncut and in nice condition. Front cover has author's inscription.