found: BGN phone call 2/20/81(Opava, ppl. 49°l57ʹN-17°55ʹE; variant Troppau; in Severmoravský kraj)
found: Stat. lex. občí ČSSR(records 2 places named Opava)
found: Col.Lippincott gaz.(Opava, N. Silesia on Opava R., 16 mi. WNW of Ostrava)
found: GeoNET name server, 3/31/97(hdg.: Opava [Czech Republic])
found: Info. from exec. sec'y, Foreign Names Committee, BGN, Nov. 17, 2000(Opava now located is Ostravský kraj)
found: GEOnet, Dec. 14, 2000(Opava--PPLA, 49°57ʹN 17°55ʹE, variants: Troppau, Opawa; Okres Opava; other Opava noted above now located in Slovakia)