Crookes D, Humphreys D, Masroh F, Tarchie B, Milner-Gulland E2007Journal article Journal:South African Journal of Economic and Management SciencesVolume:10Issue:4, AOSIS, pp.457 - 469No abstract availableKeywords:38 Economics , 35 Commerce, Management, Tourism and Services DOI10.4102/sajems.v10i4.1059