Herman Cudris Castañeda

Stamps Category Science Herman Cudris Castañeda

Resonant Circuit and Electrical Flow Lines - Europe (C.E.P.T.) - Great Achievements of the Human Mind
Germany
Chemical.
Czechoslovakia
EWnergía plant, near Verbois.
Switzerland
Hydroelectricity - International Hydrological Decade - Dam-Dyke.
Papua New Guinea
Samuel Finley Breese Morse (1791-1872)First Cent.
Peru
Jupiter - 10th Anniversary of the Humboldt Planetarium.
Venezuela
El Solm - 10th Anniversary of the Humboldt Planetarium
Venezuela
Dr: Roberto Koch (1843-1910) - Ministry of Health Building - Centenary of the Discovery of Bacillus
Denmark
Meteorological Satellite - World Meteorological Organization.
ONU
xMeteorological Satellite - World Meteorological Organization
ONU