Other Resources:
- Foundation Design and Analysis Home Page
- Soil Mechanics: Lecture 13, Slope Stability (important for understanding global stability of retaining walls)
- Retaining Walls Part I: Review of Lateral Earth Pressures, Concrete Gravity Walls and Mechanically Stabilized Earth Walls (slide presentation)
- A Simplified Method to Design Cantilever Gravity Walls
- Who’s This Idiot? That’s Me!
vulcanhammer.net 
This is so much more detailed than I expected. Thanks for the tips on retaining walls!
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