Yazar
d j helfand
7 cilt bulundu.
D. J. Helfand · Columbia University Press
325 sayfa · 2016
Missing observations (Statistics) / Science / Methodology / Statistics / Scientific Errors
D. J. Helfand · National Aeronautics and Space Administration, George C. Marshall Space Flight Center
Sayfa sayısı yok · 1991
X-rays / Cosmic rays
D. J. Helfand · National Aeronautics and Space Administration
Sayfa sayısı yok · 1995
Galaxies / Spaceborne astronomy / X ray astronomy / Stellar luminosity / Galactic structure
D. J. Helfand · National Aeronautics and Space Administration
Sayfa sayısı yok · 1996
Gamma ray bursts / X ray astronomy / Astronomical catalogs / Point sources / Computer programs
D. J. Helfand · National Aeronautics and Space Administration
Sayfa sayısı yok · 1992
X-ray telescopes