Stamp Chats: British Raj in Tibet on the British Indian Military and Civilian Postal History in Tibet Between 1888-1955

British Raj in Tibet on the British Indian Military and Civilian Postal History in Tibet Between 1888-1955 will be presented by Mr. Danny Wong, internationally acclaimed philatelist and author and will be hosted by the American Philatelic Society.

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Thematic: Petroleum

Petroleum is a naturally occurring, yellowish-black liquid found in geological formations beneath the Earth’s surface. It is commonly refined into various types of fuels. Components of petroleum are separated using a technique called fractional distillation, i.e. separation of a liquid mixture into fractions differing in boiling point by means of…

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