Best SEO Guides, Tips and Resources of 2010
Webbiquity
JANUARY 26, 2011
SEO vs. PPC stats, and the ROI of SEO. Search Marketing in a B2B World – PPC and SEO by SlideShare. For many if not most companies, PPC and SEO should both be part of the marketing mix; but it’s important to recognize their differing and often complementary strengths.
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