Shehadeh, "Natural radioactivity
concentrations in soil samples along the Amman Aqaba Highway, Jordan," Radiation Measurements, vol.
Kumar, "Study of radon, thoron exhalation and natural radioactivity
in coal and fly ash samples of kota super thermal power plant, Rajasthan, India," Radiation Protection Dosimetry, pp.
Sedqy, "Assessment of natural radioactivity
in fertilizers and phosphate ores in Egypt," Journal of Taibah University for Science, vol.
OECD Organization for Economic Cooperation and Development Exposure to radiation from natural radioactivity
in building materials Reported by a group of experts of OECD Nuclear Energy Agency Paris France (1979).
Determination of the natural radioactivity
levels in north west of Dukhan, Qatar using high-resolution gamma-ray spectrometry.
This paper presents the measurement of atmospheric stability by natural radioactivity
data of radon from July 11, 2007, to May 31, 2008, in one of the most polluted cities in north-central China, Lanzhou.
 C M Sunta, M David, M C Abani, A S Basu, K S V Nambi, Analysis of Dosimetry data of high natural radioactivity
areas of south west coast of India.Natural Radiation Environment, Proceedings of International Symposium on Natural Radiation Environment Bombay(1993).,India.
Radiological Protection Principles Concerning the Natural Radioactivity
of Building Materials.
Concentrations in Soil Samples Along the Amman Aqaba Highway, Jordan, Radiation Measurements 36(1-6): 555-560.
The natural radioactivity
of the earth varies greatly from one place to another, depending on the concentration of rocks containing uranium.
Obtained concentrations of K (%), [sup.232]Th and [sup.238]U (ppm) in measured rock samples were compared with the newest results concerning natural radioactivity
of the soils occurring in the investigated area (Malczewski and Zaba, 2007).