X-ray astronomy-Cyg X-1 and X-3 above 7 keV observed from OSO-7

X-ray astronomy-Explanation of a break in the background spectrum

X-ray astronomy-Flux from galactic anticentre

X-ray astronomy-Hard radiation from AQL X-1

X-ray astronomy-Hard spectrum of Her X-1

X-ray astronomy-Hard X-ray observations of some Uhuru sources

X-ray astronomy-Hard X-rays from Coma constellation

X-ray astronomy-Hz Herculis 35-d cycle

X-ray astronomy-Implications of Cen X-3 period decrease for mass loss models

X-ray astronomy-Implications of the radial velocity of Sco X-1

X-ray astronomy-More data on variability of M87

X-ray astronomy-Nature of Cyg X-3

X-ray astronomy-Nature of Her X-1

X-ray astronomy-Position of Cen XR-2, April 1967

X-ray astronomy-Pup A mapped by Copernicus

X-ray astronomy-Search for iron line emission from Sco X-1

X-Ray astronomy-SMC X-1 observed from OSO-7

X-ray astronomy-Soft source near λ-Sco

X-ray astronomy-Some southern hemisphere sources

X-ray astronomy-Structure of Cas A seen from Copernicus