Technical Report Archive & Image Library (TRAIL) - 2 Matching Results
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- Air traffic
- This report presents a recounting of the steps taken by France to establish national and international regulation over air traffic.
- Ocher and Ochery Earths
- Report about ocher or ochery earth, "a natural mineral pigment composed largely of clay permeated with hydrated iron (ferric oxide)" (p. 2). It includes information about the uses of choer, substitutes, artificial ocher, mining and local deposits, import and export of ocher, and related information.