Rumpel, N.; Kammerer, F.; Wagmann, M.; Zehringer, M. Gamma Ray Spectrometry of Sewer Sludge – A Useful Tool for the Identification of Emission Sources in a City: Highlights of Analytical Sciences in Switzerland. Chimia 2015, 69 (5), 301. https://doi.org/10.2533/chimia.2015.301.