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Some beach and bluff areas which were relatively stable during the low water period have also been developed even though they were subjected to erosion in 1951-52 . Mekong river bank erosion protection schemes in Vientiane ; and land-titling start-up activities which included aerial photography , preliminary studies and training A new development in 1994-95 was the provision of in-country training courses on Trade Policy and Project Management and Evaluation . Many of the old buildings lay buried beneath waste tips which tumbled down the hillside . They created clay stamps which contained a glyph ( Maya symbol used for writing ) . Conversely , layout tools which handled the more traditional layouts for other technologies did not comprehend the layout components .