Boltzmann’s equation 40 c — Nicaragua, 1971
Boltzmann’s equation (Nicaragua, 1971), face value 40 c, “Mathematics” series. Photo, catalogue value, details and photo identification.
- Series
- Mathematics
- Issue date
- 1971
- Face value
- 40 c
- Colors
- Multicolor
Boltzmann’s equation (Nicaragua, 1971), face value 40 c, “Mathematics” series. Photo, catalogue value, details and photo identification.