marcos alvarado flores

Stamps Year 1975 . Marcos Alvarado Flores

                                           
Jefferson memorial
                                  United States
                                
They brought a Roman post
                                  Romania
                                
Roman post decebal
                                  Romania
                                
Francisco Hernandez,
                                  Mexico
                                
Alfonzo L. Herrera biologist 1868-1942
                                  Mexico
                                
Arturo rosenblueth 1900-1970
                                  Mexico
                                
Alfredo Augusto Duges Naturalist 1826-1910
                                  Mexico
                                
Notions of botany professor Luis Landa
                                  Honduras