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Determination of the manning coefficient from measured bed roughness in natural channels
John Thomas Limerinos
1970, Water Supply Paper 1898-B
This report presents the results of a study to test the hypothesis that basic values of the Manning roughness coefficient of stream channels may be related to (1) some characteristic size of the streambed particles and to (2) the distribution of particle size. These two elements involving particle size can...
Geologic map of the Fra Mauro region of the Moon-- Apollo 13
Richard E. Eggleton, Terry W. Offield
1970, Open-File Report 70-245
The accompanying map shows the geology of the Fra Mauro site- the proposed landing site for the Apollo 13 mission to the Moon. This site lies about 80 km north of the ancient crater Fra Mauro, in a north-south belt of predominantly hummocky uplands terrain geologically distinct from the mare...