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Leonard Jaczewski (1858-1916) was a Polish geologist, geographer, engineer and explorer of Siberia. He was one of the pioneers in the study of permafrost.
- (Polish) Leonard Jaczewski, biography
- Analecta: studia i materiały z dziejów nauki. Wydawnictwo IHNOIT PAN. 1999. p. 102. Retrieved 24 April 2013.
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