The international hydrological decade

The international hydrological decade
Catalog #
3410
Date of Issue
1966 12 October
Denomination
6k
Color
Multicolor
Artist
Printing method
Bar offset
Perforation
Comb 11½
Issued
4,000,000
Description
The emblem of the International hydrological decade. Schematic representation of the water cycle in nature.

Advertising