1. Merriam-Webster’s Collegiate Dictionary,1997
2. Acronyms of clinical trials in cardiology—1998;Cheng;Am Heart J,1999
3. Branwyn G. Jargon watch. Available at http://www.wired.com/wired/5.07/jargon.html
4. The National Climatic Data Center. Available at http://www.ncdc.noaa.gov/ol/radar/radarresources.html