1
Soil sampling and methods of analysis /
Book
...GNA - Geology - soil sciences...
Table of Contents 
2
Soil sampling, preparation, and analysis /
Book
...GNA - Geology - soil sciences...
Table of Contents 
3
Humic substances. 2. in search of structure : 2nd International Conference of IHSS : invited papers : Birmingham, 07.84.
Book
...GNA - Geology - soil sciences...