DIN EN 13508-2 Corrigendum 1:2007 Conditions of drain and sewer systems outside buildings-Part 2:Visual inspection coding system Corrigendum 1 to English version of DIN EN 13508-2:2003-09
2011DIN EN 13508-2:2011-08 Investigation and assessment of drain and sewer systems outside buildings - Part 2: Visual inspection coding system; German version EN 13508-2:2003+A1:2011
2011DIN EN 13508-2:2011 Investigation and assessment of drain and sewer systems outside buildings - Part 2: Visual inspection coding system; German version EN 13508-2:2003+A1:2011