March 23, 1973
Pakistan on International Meteorological Organization
A commemorative postage stamp on the Centenary of the World Meteorological Organisation (WMO) : Issued by Pakistan Issued on Mar 23, 1973 Issued for : To commemorate the centenary of IMO/WMO, the Pakistan Post Office is issuing a postage stamp of 20 Paisa denomination on the 23rd March,
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