Selected papers of the Ho Chi Minh City symposium on acid sulphate soils : Ho Chi Minh City, Viet Nam, March 1992 / ed. by D.L. Dent and M.E.F. van MensvoortSelected papers of the workshop on integrated management of coastal resources in the Mekong delta, Vietnam : Can Tho, Vietnam, August 2000 / M.E.F. van Mensvoort & Le Quang Tri (eds.)