According to Wikipedia, Erik Tengström , Swedish astronomer and geodesist. Tengström was born in Motala, Sweden, and was a descendant of the first archbishop of Åbo Jacob Tengström. He enrolled in Stockholm University in 1932, where he studied astronomy, physics and geology. After teaching at the Royal Institute of Technology in Stockholm and while working as state geodesist at the Geographical Survey Office of Sweden 1949-1954, he completed his Licentiate in 1952 and his PhD in geodesy at Uppsala University in 1954 with the dissertation Outlines of a method for determining the geoid in Sweden by free-air anomalies . He produced about 60 scientific reports and articles.
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Refractional influences in astrometry and geodesy : symposium no. 89, organized by IAU in cooperation with IAG and IUGG, held in Uppsala, Sweden, 1-5 August 1978 (1979) (1)
