Gault DE, Quaide WL, Oberbeck VR, Moore HJ. Luna 9 Photographs: Evidence for a Fragmental Surface Layer.
Science 1966;
153:985-8. [PMID:
17837250 DOI:
10.1126/science.153.3739.985]
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Abstract
The morphological features of the lunar surface photographed by Luna 9 indicate a surficial layer of weakly cohesive to noncohesive frag mental material. Most of this material is finer than a centimeter and probably finer than a few millimeters, although objects of centimeter size and larger are plentiful.
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