1978 International Stamp Exhibition “PRAGA ’78” – Prague, Czeck Republic
1978 International Stamp Exhibition “PRAGA ’78” – Prague, Czeck Republic
Bolivia
1978 International Stamp Exhibition “CAPEX ’78” – Toronto, Canada
1978 International Stamp Exhibition “CAPEX ’78” – Toronto, Canada
1978 International Stamp Exhibition “HONDURAS ’78” – Tegucigalpa, Honduras
1978 International Stamp Exhibition “HONDURAS ’78” – Tegucigalpa, Honduras
1978 The 50th Anniversary of the Audit Department
1978 The 50th Anniversary of the Audit Department
1977 National Stamp Exhibition “EXFIVIA 77”, Cochabamba
1977 National Stamp Exhibition “EXFIVIA 77”, Cochabamba
1977 The 50th Anniversary of the Bolivian Radio
1977 The 50th Anniversary of the Bolivian Radio
1977 International Tin Symposium, La Paz
1977 International Tin Symposium, La Paz
1977 The 25th Anniversary of the Bolivian Mining Corporation
1977 The 25th Anniversary of the Bolivian Mining Corporation
1977 The Eigth Bolivarian Games, La Paz
1977 The Eigth Bolivarian Games, La Paz