Druviet, R Ya and Birkman, Zh M, 1960, Peat deposits of the Latvian SSR and their utilization: Riga (in Russian).
Normals, P A, 1943, A survey of bogs in Vidzeme and Latgale: Riga (in Latvian).
Stelle, V Ya, Savvaitov, A S and Veksler, V S, 1974, Stratigraphy and absolute chronology of the Salaspils section, in
Ail-Union seminar astrophysical phenomena and radiocarbon, Proc: , p 352–358
Stelle, V Ya and Veksler, V S, 1975, Radiocarbon dating of Sarnate bog deposits, in
Seminar, experience and methods of isotope-geochemical studies in the Baltic Republics of the USSR and Byelorussia, Proc: Riga, p 82–84