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| 1 | International Symposium on Environmental Concerns (1990. Elsinore, Denmark) Environmental concerns : an inter-disciplinary exercise / edited by J. Aa. Hansen ; organized by Danish Academy of Technical Sciences . — London : Elsevier Applied Science, [1991]. — 297 p. : il., gráf., tab. ; 25 cm. — |  | ||
| 2 | Tamzin Pinkerton Local Food : How to make it happen in your community . — UK : Transitioni books, 2009. — 216 p. — |  |
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