Ancient Civilisations
Radio Carbon Dating 
Warren, S. (1992) Cities in the Sand. San Francisco: Chronicle Books
Pizarro and the Inca Gold 
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Maley, A. And Duff, A. (1976) Beyond Words: Teachers Book. Cambridge: Cambridge University Press
How Old is it?
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Warren, S. (1992) Cities in the Sand. San Francisco: Chronicle Books
Angkor Vat 
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Source: Lewis, R. (1971) Reading for Adults 1. Rayleigh: Longman
Economic Systems
Alternative Economic Systems 
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Adapted from: Lipsey, R.G.; Chrystal, K.A. (1995) An Introduction to Positive Economics, New York: Oxford
Theoretical Constructs 
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Source: Ormerod, Paul (1994) The Death of Economics London: Faber and Faber
The New Zealand Experiment -
A World Model for Structural Adjustment?
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Source: Study Theme: Economic Systems, English Language Institute,Victoria University of Wellington
Misplaced Incentives 
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Source: Lipsey, R.G.; Chrystal, K.A. (1995) An introduction to Positive Economics-, New York: Oxford University Press
Earthquakes
Eathquake Drills 
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What causes Earthquakes 
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The Richter Scale
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The Mercalli Scale 
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