8 2011 36 241 2011 37 232 2011 38 226 2011 39 217 | Jan Hamrin, Chapter 1, The Renewable Energy Policy Manual, Organization of American States, undated |
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8 2011 92 52 2011 93 51 | Committee on 21st Century Systems Agriculture 2010 |
7 2011 81 67 2011 82 66 2011 83 65.
39 2011 112 26 2011 113 25 | Paul Weiss chairman of renewable resources study 1962 |
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3 2011 119 21 2011 120 20 2011 121 18 | 6 2011 42 211 2011 43 210 |