Stamps Year 1991

Physicist Sakharov
Pedro Gruenholz
Science and technique
Francisco Javier Novoa Mendoza
Christmas
Gloria Patricia Laverde
Christmas 1991.
Carlos Augusto Velasquez Parra
Gloria Patricia Laverde
America
Gloria Patricia Laverde
Brown Eagle
Gloria Patricia Laverde
Pioneers of Aviation - Harriet Quimby.
josep colomer valls
America
Gloria Patricia Laverde
V Centennial of the Foundation of Santa Fe.
josep colomer valls