South America
1991 The 100th Anniversary of the First Flight of Otto Lilienthal – European Airmail Exhibition “LILIENTHAL ’91” – Dresden
1991 The 100th Anniversary of the First Flight of Otto Lilienthal – European Airmail Exhibition “LILIENTHAL ’91” – Dresden
1991 National Population and Housing Census
1991 National Population and Housing Census
1991 America UPAEP – Voyages of Discovery
1991 America UPAEP – Voyages of Discovery
1991 President Jaime Paz Zamora National Grand Prix Motor Rally, Tarija-Cobija
1991 President Jaime Paz Zamora National Grand Prix Motor Rally, Tarija-Cobija
1991 Presidential Summit of Bolivia and Peru
1991 Presidential Summit of Bolivia and Peru
1991 The 20th Anniversary of the Bolivian Philatelic Federation
1991 The 20th Anniversary of the Bolivian Philatelic Federation
1991 Meeting of Bolivian and Argentine Presidents
1991 Meeting of Bolivian and Argentine Presidents