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Postcard with Yemen postage stamp commemorating the inauguration of new World Health Organization offices
Stamp issued by the Yemen Arab Republic depicting Persian polymath Avicenna (circa 980 - 1037), also known as Ibn Sina, Abu Ali Sina, and Pur Sina, as well as red roses and the new World Health Organization headquarters…
Cachet and stamp depict oil pipeline and drilling derricks.
- Manufacturer Thomas De La Rue & Company
- Subject Petroleum industry and trade, Postage stamps, Egypt, United Arab Republic, Postmarks, Commemorative postage stamps, Science on postage stamps, Congresses and conventions, Cachets (Philately), First day covers (Philately), Petroleum engineering, League of Arab States, Arab Petroleum Congress
Depicts oil derrick, pipeline, and emblem of the 6th Annual Arab Petroleum Congress held in Baghdad, Iraq in March 1967.
Stamp depicts a generic formula for an amino acid where R stands for "radical." In organic chemistry, this nomenclature represents the possibility of any one of a series of aliphatic groups, like methyl, ethyl, propyl,…
Postage stamp from Dubai, featuring a depiction of Persian polymath Avicenna (circa 980 - 1037), also known as Ibn Sina, Abu Ali Sina, and Pur Sina. Avicenna is regarded as one of the most significant physicians,…
- After 1979 – before 2000
Postage stamp from Comoros, an archipelago of volcanic islands situated off the south-east coast of Africa, featuring a depiction of Persian polymath Avicenna (circa 980 - 1037), also known as Ibn Sina, Abu Ali Sina,…