238 resultados para collecting tires

em University of Michigan


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Transportation Department, Office of the Assistant Secretary for Systems Development and Technology, Washington, D.C.

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Mode of access: Internet.

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National Highway Traffic Safety Administration, Office of Research and Development, Washington, D.C.

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National Highway Traffic Safety Administration, Washington, D.C.

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National Highway Traffic Safety Administration, Office of Research and Development, Washington, D.C.

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Because the use of filters to sample particulate matter suspended in the upper atmosphere has been investigated and has yielded rather disappointing results, an examination of other methods of upper atmospheric sampling is desirable, and this is the aim of the present report. The nature of any radioactive material, and its relation to the size and composition of the suspended particles is of particular interest.

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Format not distributed to depository libraries.

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National Bureau of Standards, Office of Vehicle Systems Research, Washington, D.C.

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Transportation Department, Office of Noise Abatement, Washington, D.C.

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National Highway Traffic Safety Administration, Office of Heavy Duty Vehicle Research, Washington, D.C.