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2. Anderson, K. E. 2007. Report on Pullet Rearing Period: 37th North Carolina Layer Performance and Management Test. Vol. 37, No. 2, December 2007. North Carolina State University Cooperative Extension Service, Raleigh. Accessed Mar. 30, 2009. http://www.ces.ncsu.edu/depts/poulsci/tech_manuals/layer_reports/37_grow_report.pdf.
3. Overview of natural and organic production: Looking back to the future;Anderson;J. Appl. Poult. Res.,2009
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