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bibliographie associated press, « mad cow boosts natural beef sales », cnn, 13 octobre 2005 boland, mike, liz boyle et christy lusk, « economic issues with natural and organic beef », agmarc, university of kansas, août 2002 http://www.agmrc.org/nr/rdonlyres/3af0e192-32ec-41b6-8384b0588b795475/0/ksueconbeef.pdf boland, mike et ted schroeder, « marginal value of quality attributes for natural and organic beef », agmarc, university of kansas, août 2002 http://www.agmrc.org/nr/rdonlyres/f51724a9-d3f8-4cc7-8a4edf1c546b7133/0/ksunatbeef.pdf clause, reginald, « natural beef profile », agmarc, iowa state university, septembre 2005 http://www.agmrc.org/agmrc/commodity/livestock/beef/naturalbeefprofile.htm givry, sebastien, « a consumer survey to identify marketing issues for natural beef », agmarc, university of kansas, août 2002 http://www.agmrc.org/nr/rdonlyres/01d43b6e-f69d-4b7c-aea4d0cdc7ed9d3f/0/ksuconsnatbeef.pdf grannis, jennifer et dawn thilmany, « marketing opportunities for natural beef products in the intermountain west », colorado state university, juin 2000 http://dare.agsci.colostate.edu/csuagecon/extension/docs/agmarketing/beef.pdf « grass-fed natural beef niche for ranchers », university of california, sustainable agriculture research and education program, 1997 http://www.sarep.ucdavis.edu/news/9701apr.htm nader, glenn, « natural beef:
bibliography boland, mike, liz boyle and christy lusk "economic issues with natural and organic beef’ agmarc – university of kansas – august 2002 http://www.agmrc.org/nr/rdonlyres/3af0e192-32ec-41b6-8384b0588b795475/0/ksueconbeef.pdf boland, mike and ted schroeder "marginal value of quality attributes for natural and organic beef" - agmarc – university of kansas – august 2002 http://www.agmrc.org/nr/rdonlyres/f51724a9-d3f8-4cc7-8a4edf1c546b7133/0/ksunatbeef.pdf clause, reginald "natural beef profile" – agmrc, iowa state university – september 2005 http://www.agmrc.org/agmrc/commodity/livestock/beef/naturalbeefprofile.htm givry, sebastien "a consumer survey to identify marketing issues for natural beef agmarc – university of kansas – august 2002 http://www.agmrc.org/nr/rdonlyres/01d43b6e-f69d-4b7c-aea4d0cdc7ed9d3f/0/ksuconsnatbeef.pdf grannis, jennifer and dawn thilmany "marketing opportunities for natural beef products in the intermountain west" – colorado state university – june 2000 http://dare.agsci.colostate.edu/csuagecon/extension/docs/agmarketing/beef.pdf nader, glenn "natural beef: