2007DIN 19682-12:2007-11 Soil quality - Field tests - Part 12: Determination of degree of decomposition of peat
2007DIN 19682-12:2007 Soil quality - Field tests - Part 12: Determination of degree of decomposition of peat
1997DIN 19682-12:1997 Methods of soil investigations for agricultural engineering - Field tests - Part 12: Determination of degree of decomposition of peat