International Astronomical Union. Colloquium (123rd : 1990 : Greenbelt, Md.)
Observatories in earth orbit and beyond : proceedings of the 123rd Colloquium of the International Astronomical Union, held in Greenbelt, Maryland, April 24-27, 1990 / edited by Y. Kondo.
Orbiting astronomical observatories -- Congresses.
Astronomy -- Congresses.
Astrophysics -- Congresses.
OAO (Satellites artificiels) -- Congrs̀ˆ.
Astronomie -- Congrs̀ˆ.
Astrophysique -- Congrs̀ˆ.
Astronomy fast (OCoLC)fst00819673
Astrophysics fast (OCoLC)fst00819797
Orbiting astronomical observatories. fast (OCoLC)fst01047244
Observatories
Conference proceedings. fast (OCoLC)fst01423772
Kondo, Yoji.