Stamp collection UNO Vienna number Yvert and Tellier 141/144 MNH

The House of the Collector proposes to you Collection stamps UNO Vienna number Yvert and Tellier 141/144 MNH: ?Summit planet Ground June 1992? Conference of the United Nations on the environment and the development the House of the Collector makes a point of suggesting you this sorter which will enable you to arrange and to preserve your invaluable acquisitions.