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2. American Veterinary Medical Association, 2006. AVMA Membership and Resource Manual. Division of Membership and Field Services Schaumburg, IL.
3. CattleMAP Manual;Anon,2003
4. The willingness-to-pay technique in evaluating on-farm animal research in Brazil;Baker;Agric. Sys.,1988
5. Effectiveness and Impact of CATTLEMAP;Barlow,2000