The Spartacus Educational website provides a series of free history encyclopaedias. Entries usually include a narrative, illustrations and primary sources. The text within each entry is linked to other relevant pages in the encyclopaedia. In this way it is possible to research individual people and events in great detail. The sources are also hyper-linked so the student is able to find out about the writer, artist, newspaper and organization that produced the material.
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Ad spots
8 ad spots, with formats, rates and how each is bought.
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Channels
Each ad spot filed under where it runs — web, video, search, TV — so you know which one you are buying.
Exchanges
The DSPs that reach this site, and who runs its ad sales.
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