Stamps Category Science

Halley's Comet 1986
carlos ródenas ferré
CCCP - 2kon.
Herman Cudris Castañeda
C.F.Schönbein 1799-1868- chemist
carlos ródenas ferré
40th Anniversary of the National Council of Science and Technology - Conacyt.
Herman Cudris Castañeda
Exchange 0.30 usd 600 l.
Francisco Javier Jiménez Frías
Chimay
Miguel Rodríguez López
Averbode
Miguel Rodríguez López
C.E.R.N
Miguel Rodríguez López
Exchange 0.45 usd 4.50 krone 1990
Francisco Javier Jiménez Frías
Exchange 0.35 usd 2.90 krone 1993
Francisco Javier Jiménez Frías