A Gamma Ray Monitor for the OSO-7 Spacecraft Higbie, P. R. ; Chupp, E. L. ; Forrest, D. J. ; Gleske, I. U. Abstract Publication: IEEE Transactions on Nuclear Science Pub Date: February 1972 DOI: 10.1109/TNS.1972.4326565 Bibcode: 1972ITNS...19..606H