From MarketingSherpa
- Search Marketing Benchmark Guide 2008 - Executive Summary PDF includes sample charts, heatmap, and table of contents.
- Annual Study Presentation Top 5 Search Marketing Opportunities for 2007 Audio file, transcript plus PDF of slides.
- Article:3,944 Marketers Reveal Search Marketing Costs, Clicks, & Conversions Fall 2006
- PDF Excerpt from: Buyer's Guide to Search Engine Optimization (SEO) Firms May 2006
- PDF Excerpt from Buyer's Guide to PPC Search Agencies May 2006
