1957-12-21: 50 Years of Petroleum Tax Exploitation

1957-12-21: 50 Years of Petroleum Tax Exploitation

1957-12-19: Personalities and Landscapes - Offset

1957-11-06: International Week of the Letter - Homing Pigeon

1957-11-06: International Week of the Letter - Homing Pigeon

1957-09-28: Connstitutional Reform Convention

1957-09-28: Connstitutional Reform Convention

1957-09-14: International Tourism Congress

1957-08-31: Centenary of Argentine railroads.

1957-08-16: Inter-American Economical Conference

1957-08-16: Inter-American Economical Conference

1957-07-06: 150 Ann. Defense of Buenos Aires - Church of Santo Domingo

1957-07: Personalities and Landscapes - Typo

1957-04-01: Personalities and Landscapes - Photo

1957-03-02: 100th Anniversary of the Death of Admiral G. Brown

1957: Official

1957: Famous Argentinians - Wmk round sun RA