Optimum operation of G-M counters_______________________ Optimum operation of scintillation and proportional counters. __ Background control chart_________________________________ Standard control chart__-______-_____-__________-______-__ Determination of gross beta activity in water.________________________ Principle of determination___________-________.-._______ Apparatus____________________________________________________ Reagents-________-____-_-__-___________________-___-__-_.
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