V. J. Janzer. Discordant Gross Radioactivity Measurements of Natural and Treated Waters. In: Effluent and Environmental Radiation Surveillances. ASTM STP 698. J.J. Kelly, Ed.,1980. p. 327-341.
WHO – Word Health Organization. Guidelines for Drinking-water Quality, Fourth edition, 2011.
ECORAD 2004 International Conference. Counting Efficiency of a Flow-Gas Proporcional Detector for Gross Alpha Radioactivity of Groundwaters. 2004.
if you want know how to do the measurments of gross alpha and gross bet you could read the ISO standard methdo, like as ISO11704: Water quality — Measurement of gross alpha and beta activity concentration in non-saline water — Liquid scintillation counting method, or ISO 10704 Water quality — Measurement of gross alpha and gross beta activity in non-saline water — Thin source deposit method.