Scientific and Technical Information Office, National Aeronautics and Space Administration : for sale by Supt. of Docs., U.S. Govt. Print. Off.1979.<YP19-217>
国立国会図書館
件名Interstellar hydrogen -- Observations. Emission spectroscopy. Milky Way -- Observations.
by Robert A.R. Parker, Theodore R. Gull, Robert P. KirschnerScientific and Technical Information Office, National Aeronautics and Space Administration : for sale by Supt. of Docs., U.S. Govt. Print. Off.1979