ISO 3166-2:BG in the ISO 3166-2 standard published by the ISO 3166 Maintenance Agency (ISO 3166/MA). "Click on the button in the header to sort each column." The following changes to the entry have been announced by the ISO 3166/MA since the first publication of ISO 3166-2 in 1998. ISO stopped issuing newsletters in 2013. 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.
Briegleb BG-7 and fabric. The longer wing created stability issues and many aircraft were subsequently modified by either lengthening the tail to increase the tail arm or enlarging the vertical fin. Cockpit modifications were also common. Three BG-7s were completed by the factory and a further 20 kits were sold. The type was never certified and most were amateur-built from factory kits. In 1952 Betsy Woodward Proudfit, flying a BG-7, set the feminine speed record for the triangle, at . The record stood for eighteen years. In March 2011 there were still 2 BG-7s on the Federal Aviation Administration register. Briegleb BG-7