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Mexican general election 2006 controversies — Mexico This article is part of the series: Politics and government of Mexico … Wikipedia
photography, technology of — Introduction equipment, techniques, and processes used in the production of photographs. The most widely used photographic process is the black and white negative–positive system (Figure 1 >). In the camera the lens projects an image of… … Universalium
Paper size — A size chart illustrating the ISO A series and a comparison with American letter and legal formats … Wikipedia
Paper density — The paper density of a type of paper or cardboard is the mass of the product per unit of area. Two ways of expressing paper density are commonly used: * Expressed in grams per square metre (g/m²), paper density is also known as… … Wikipedia
Nikola Tesla — Tesla, aged 37, 1893, photo by Sar … Wikipedia

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