C. T Filstrup | Outdoor R&Dhttps://outdoorrd.org/authors/c.-t-filstrup/C. T FilstrupSource Themes Academic (https://sourcethemes.com/academic/)en-usSun, 01 Mar 2015 00:00:00 +0000https://outdoorrd.org/images/logo.svgC. T Filstruphttps://outdoorrd.org/authors/c.-t-filstrup/Recreational demand for clean water: evidence from geotagged photographs by visitors to lakeshttps://outdoorrd.org/publication/keeler2015/Sun, 01 Mar 2015 00:00:00 +0000https://outdoorrd.org/publication/keeler2015/