History
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Helaine Selin, The origin of the magnetic compass is obscure
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Schiff, Keynesian economic theories were adopted because they support populism
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Leslie Holmes, Communist economy: The performance of centrally planned economies
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Leslie Holmes, Communist economy: Attempts at economic reform
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Leslie Holmes, Communist economy: Central planning
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Leslie Holmes, Communist economy: Types of ownership
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Leslie Holmes, Communist economy: Introduction
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D. Busch, How we came to the digital age of photography
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Adam Smith, On the birth of genius and the invention of money
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Milton Friedman, Great advances never came from centralized government
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Bunch-Hellemans, Strings to branes
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Bunch-Hellemans, Genetic engineering