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Source:
http://ajae.oxfordjournals.org/content/88/1/28.full.pdf.
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تفاصيل العنوان
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Source:
http://agecon.okstate.edu/faculty/publications/4477.pdf.
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تفاصيل العنوان
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Authors :
The Pennsylvania State University CiteSeerX Archives
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Source:
http://www.mvences.de/p/p1/Response_to+Bode_Coetzee_Science_July_2008.pdf.
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تفاصيل العنوان
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Source:
http://www.casa.ucl.ac.uk/working_papers/paper95.pdf.
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تفاصيل العنوان
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Source:
http://www.agmanager.info/events/risk_profit/2002/dhyuvetter.pdf.
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تفاصيل العنوان
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Source:
http://www.isws.illinois.edu/pubdoc/c/iswsc-96.pdf.
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تفاصيل العنوان
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Source:
http://proceedings.asmedigitalcollection.asme.org/data/Conferences/ES2007/71756/981_1.pdf.
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تفاصيل العنوان