![USGS Open-File Report 2005-1413: Terrestrial Radioactivity and Gamma-ray Exposure in the United States and Canada USGS Open-File Report 2005-1413: Terrestrial Radioactivity and Gamma-ray Exposure in the United States and Canada](https://pubs.usgs.gov/of/2005/1413/cosmic_let.gif)
USGS Open-File Report 2005-1413: Terrestrial Radioactivity and Gamma-ray Exposure in the United States and Canada
![Spatial map of gamma radiation at the height of 20 cm (a), and at the... | Download Scientific Diagram Spatial map of gamma radiation at the height of 20 cm (a), and at the... | Download Scientific Diagram](https://www.researchgate.net/publication/342175711/figure/fig2/AS:902917603209258@1592283740750/Spatial-map-of-gamma-radiation-at-the-height-of-20-cm-a-and-at-the-height-of-100-cm-b.png)
Spatial map of gamma radiation at the height of 20 cm (a), and at the... | Download Scientific Diagram
![USGS Open-File Report 2005-1413: Terrestrial Radioactivity and Gamma-ray Exposure in the United States and Canada USGS Open-File Report 2005-1413: Terrestrial Radioactivity and Gamma-ray Exposure in the United States and Canada](https://pubs.usgs.gov/of/2005/1413/NAMrad_K_let.gif)
USGS Open-File Report 2005-1413: Terrestrial Radioactivity and Gamma-ray Exposure in the United States and Canada
![Left: Gamma radiation map of Mainland Portugal (Torres 1997). Right:... | Download Scientific Diagram Left: Gamma radiation map of Mainland Portugal (Torres 1997). Right:... | Download Scientific Diagram](https://www.researchgate.net/publication/254502997/figure/fig1/AS:645692892667914@1530956590564/Left-Gamma-radiation-map-of-Mainland-Portugal-Torres-1997-Right-Simplified.png)
Left: Gamma radiation map of Mainland Portugal (Torres 1997). Right:... | Download Scientific Diagram
![Color online) Radiation map for outdoor and indoor gamma dose rate of... | Download Scientific Diagram Color online) Radiation map for outdoor and indoor gamma dose rate of... | Download Scientific Diagram](https://www.researchgate.net/publication/340851119/figure/fig2/AS:11431281084901784@1663463424733/Color-online-Radiation-map-for-outdoor-and-indoor-gamma-dose-rate-of-Durg-district.png)