http://www.pitchcare.com/magazine/the-water-of-lif[...] | 08/05/2009 | | | Pitchcare version |
http://www.bigga.org.uk/about-us/magazine/back-iss[...] | | | | Greenkeeper International version |
https://stri.lib.msu.edu/itb/articles/222-14.pdf | 08/2005 | PDF Reader | | Available to TGIF and STRI users |