International Cooperation Year – Stamps of Pakistan 1965.
UNO declared 1965 as International Cooperation year. Pakistan issued a set of two stamps on 26 Jun 1965 to mark International Cooperation Year. First Day cover cancelled at Karachi is listed.
Asian Philately, First Day Covers, Organisations, UNO/UN Organisations
International Cooperation Year – Stamps of Pakistan 1965.
Stamp Digest 