Gamma activity of some building materials in West Malaysia.
D003252:Construction Materials; D005720:Gamma Rays; D008296:Malaysia; D011197:Potassium Radioisotopes / Q000032:analysis*; D011883:Radium / Q000032:analysis*; D013910:Thorium / Q000032:analysis*
D011197:Potassium Radioisotopes; D013910:Thorium; D011883:Radium