2017BS EN ISO 9696:2017 Water quality. Gross alpha activity. Test method using thick source
2007BS ISO 9696:2007 Water quality - Measurement of gross alpha activity in non-saline water - Thick source method
BS ISO 9696:2007 Water quality - Measurement of gross alpha activity in non-saline water - Thick source method was changed to BS EN ISO 9696:2017 Water quality. Gross alpha activity. Test method using thick source.