The invisible sky :
Aschenbach, B.
The invisible sky : ROSAT and the age of X-ray astronomy / Bernd Aschenbach, Hermann-Michael Hahn, Joachim Trümper ; Transl. by Helmut Jenkner. - New York : Copernicus, 1998. - 175 p. : ill. (some col.) ; 25 x 29 cm. - 522/.6863 .
Translation of: Der unsichtbare Himmel. Includes index.
0387949283 (alk. paper)
ROSAT (Artificial satellite)
X-ray astronomy
522/.6863
The invisible sky : ROSAT and the age of X-ray astronomy / Bernd Aschenbach, Hermann-Michael Hahn, Joachim Trümper ; Transl. by Helmut Jenkner. - New York : Copernicus, 1998. - 175 p. : ill. (some col.) ; 25 x 29 cm. - 522/.6863 .
Translation of: Der unsichtbare Himmel. Includes index.
0387949283 (alk. paper)
ROSAT (Artificial satellite)
X-ray astronomy
522/.6863