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Farrell, Helen and Boyle, Ken and Rybaczuk, Krysia (2004) The use of GIS in establishing a trail inventory and trail-monitoring sustainability indicators. In: Environ2004: Irish Environmental Researchers� Colloquium, University of Limerick.
Mworia, John K. and Kinyamario, Jenesio I. and John, Elizabeth A. (2008) Impact of the invader Ipomoea hildebandtii on grass biomass, nitrogen mineralisation and determinants of its seedling establishment in Kajiado, Kenya. African Journal of Range and Forage Science , 25 (1). pp. 11-16. ISSN 1022-0119