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observational contrains » observational constrains, observational constraints, observational concerns
observational contacts » observational concepts, observational constraints, observational constrains
observational context » observational concepts, observation content, observationsin contexts
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1
by Ratcliffe, Martin A.
Published 2007
Springer New York
Table of Contents: “...A year in news... -- A year in news... -- Astronomers Meet to Discuss the Mysteries of the Universe...”
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2
Published 1988
Springer Berlin Heidelberg
Table of Contents: “... by the Giotto ion mass spectrometer at the comet P/Halley contact surface -- Photographic observations of tail...”