wget http://www.gorhamschaffler.com/humidity_formulas.htm -O www.gorhamschaffler.com_humidity_formulas.htm http://www.globalspec.com/reference/7276/Relative-Humidity-Basic-Laws-of-Physics-pdf -O www.globalspec.com-Relative-Humidity-Basic-Laws-of-Physics-pdf wget http://bernath.uwaterloo.ca/media/spie2002_retrievals.pdf -O bernath.uwaterloo.ca-volumeMixingRatio-spie2002_retrievals.pdf