- Carbon Dioxide, CO2, An Introduction to Infrared Spectroscopy and Greenhouse Gases, Widener University, 1996 with figure and animations
- Infrared Spectroscopy, includes material on CO2 infrared spectrum and vibrations, Cal Tech
- Cold Facts on Global Warming, B. R. Neurosciences Institute, Rockville, MD, official website of imal (Image Measurement and Analysis Lab), a sophisticated and powerful open-source image analysis and densitometry software package for Linux, Unix, OS X and similar operating systems. (also available in pdf)
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