NF M60-790-7:1999 Nuclear energy. Measurement of radioactivity in the environment-Soil. Part 7 : methodology for strontium 90 activity measurement in soil samples.
2009NF M60-790-5:2009 Measurements of radioactivity in the environment - Soil - Part 5 : measurement of strontium 90.
1999NF M60-790-7:1999 Nuclear energy. Measurement of radioactivity in the environment-Soil. Part 7 : methodology for strontium 90 activity measurement in soil samples.