http://www.magestore.com/blog/2012/09/07/magento-certificate-total-models/
Get Ready for Magento Certified Developer Exam. Magento Codepool http://blog.belvg.com/magento-certification-magento-codepool.html
Get Ready for Magento Certified Developer Exam. Magento Module Structure. http://blog.belvg.com/magento-certification-module-structure.html
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