found: Treuburg, 1990:p. 26 (Oletzko/Treuburg; Ostpreussen)
found: BGN gaz., Poland, 1988(Olecko, PPL, 54.02N, 022.31E)
found: LC in RLIN, 6-26-92(hdg.: Olecko, Poland)
found: Col.-Lipp. gaz.(under Olecko, Ger.: Treuburg, town in E. Prussia, aft. 1945 in Bialystok prov., NE Poland; 18 mi. W of Suwalki; until 1928 called Marggrabowa [no publs.])
found: GeoNames, algorithmically matched, 2009(ppl; 54°02ʹ01ʺN 022°30ʹ25ʺE)
found: GEOnet, Sept. 29, 2020:(Olecko; seat of a second-order administrative division; 54°02ʹ11ʺN 022°30ʹ30ʺE; in Województwo Warmińsko-Mazurskie; variants: Marggrabowa, Margrabowa, Oletzko, Treuburg)