TY - GEN A1 - Pietsch, Dana A1 - Lucke, Bernhard T1 - Soil substrate classification and the FAO and World Reference Base systems: examples from Yemen and Jordan T2 - European journal of soil science Y1 - 2008 SN - 1365-2389 SN - 1351-0754 VL - 59 IS - 4 SP - 824 EP - 834 ER -