1. Standard for natural radioactivity of fly ash as building materials;AEC (Atomic Energy Council),1992
2. Radiological health protection standards for building materials;DIH (Department of Industrial Hygiene),1986
3. Principles for limiting exposure of the public to natural sources of radiation;ICRP (International Commission on Radiological Protection),1984
4. A study on radioactivity of building materials;Krisiuk,1971
5. Indoor gamma radiation dose measurement;Lin;Nuclear Energy Monthly of Taiwan Power Co. Taipei, Taiwan,1989