TY - RPRT TI - The Einstein Observatory Extended Medium-Sensitivity Survey. I - X-ray data and analysis AU - Gioia, I. M. AU - Maccacaro, T. AU - Schild, R. E. AU - Wolter, A. AU - Stocke, J. T. PY - 1990 UR - https://ntrs.nasa.gov/citations/19900041511 ID - 19900041511 ER -