1. Alley, W.M., et al. 2013. Too hot to touch: The problem of high-level nuclear waste. Cambridge: Cambridge University Press.
2. ASCE. 2013. Failure to act. The impact of current infrastructure investment on America’s economic future. Reston: American Society of Civil Engineers.
3. Courland, R. 2011. Concrete planet: The strange and fascinating story of the world’s most common man-made material. Amherst: Prometheus Books.
4. Senate 112-25. 2011. Hydropower. U.S. Senate hearing.