1. Quality assurance of investigation, sampling and evaluation
2. Theory and Methods of sampling
2.1 Sampling weight, sampling quantity, composite samples, sampling spots (spacing and geometry)
W. Rasemann, M. Herbst, U. Seltmann, H. Kreutzmann: Industrial Wastes and Waste Dumps, Sampling and Analysis. Encyclopedia of Analytical Chemistry, John Wiley & Sons Ltd., © 2019, pp 1–93.