Astrometric observations of comets and asteroids and subsequent orbital investigations : semiannual progress report no. 30 for the period 1 May through 31 October 1988 /
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| Format: | Government Document Book |
| Language: | English |
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[Washington, D.C.] : [Springfield, Va.] :
[National Aeronautics and Space Administration] ; [National Technical Information Service, distributor],
[1988]
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| Series: | NASA contractor report ;
NASA CR-183000. |
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