@book{
international2011iaea,
title={Certified Reference Materials for Radioactivity Measurements in Environmental Samples of Soil and Water},
series={Analytical Quality in Nuclear Applications Series},
number={21},
year={2011},
url={http://www.dgdingfa.net/publications/8595/certified-reference-materials-for-radioactivity-measurements-in-environmental-samples-of-soil-and-water},
publisher={INTERNATIONAL ATOMIC ENERGY AGENCY},
address={Vienna}
}