A study of neutral hydrogen gas motion within spiral arms and in the local region.
Maryland : Astronomy Program, University of Maryland, 1971.
120 págs. (anilladas).
Tesis (doctorado) —University of Maryland, 1971.
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Maryland : Astronomy Program, University of Maryland, 1971.
120 págs. (anilladas).
Tesis (doctorado) —University of Maryland, 1971.