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Lua i Stíl Chicago (17ú heag.)Burgenmeier, Beat. Economy, Environment, and Technology: A Socioeconomic Approach. Armonk, N.Y: M.E. Sharpe, 1994.
Lua MLA (9ú heag.)Burgenmeier, Beat. Economy, Environment, and Technology: A Socioeconomic Approach. M.E. Sharpe, 1994.
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