Title: Large low-frequency orbiting radio telescope /
Authors: Schürch, Hans U., 1921-; Hedgepeth, John M.; Hedgepeth, John M.,; Astro Research Corporation.; Goddard Space Flight Center.
Publisher: National Aeronautics and Space Administration; for sale by the Clearinghouse for Federal Scientific and Technical Information, Springfield, Va.,
Year: 1968
Subjects: Radio telescopes.; Orbiting astronomical observatories.