NASA NTRS · 19670000473
Tool samples subsurface soil free of surface contaminants
Abstract
Sampling device obtains pure subsurface soil that is free of any foreign substance that may exist on the surface. It is introduced through a contaminated surface area in a closed condition, opened, and a subsurface sample collected, sealed while in the subsurface position, and then withdrawn.
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Kemmerer, W. W., Wooley, B. C.. 1967-11-01. Tool samples subsurface soil free of surface contaminants. https://ntrs.nasa.gov/citations/19670000473
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