ISO 3166-2:BG ISO 3166-2:BG ISO 3166-2:BG is the entry for Bulgaria in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1. Currently for Bulgaria, ISO 3166-2 codes are defined for 28 districts. Each code consists of two parts, separated by a hyphen. The first part is , the ISO 3166-1 alpha-2 code of Bulgaria. The second part is two digits (01–28). The codes are assigned in Bulgarian alphabetical order. Subdivision names are listed as
Briegleb BG-7 Briegleb BG-7 The Briegleb BG-7 is an American strut-braced high-wing, single seat glider that was designed by William G. Briegleb and produced by the Sailplane Corporation of America as a completed aircraft and also as a kit. The BG-7 was a development of the 1939 BG-6, with longer, semi-tapered wings of span, compared to the wing on the earlier model. The BG-7 wing is made from wood structure, with two spars and covered in doped aircraft fabric. The wing is supported by dual struts. The fuselage is made from steel tube, again with fabric covering and the tail is metal