ISOMER-SHIFT SYSTEMATICS OF 57Co IMPLANTED IN GROUP IV SEMICONDUCTORS G. WEYER, G. GREBE, A. KETTSCHAU, B. I. DEUTCH, A. NYLANDSTED LARSEN and O. HOLCK J. Phys. Colloques, 37 C6 (1976) C6-893-C6-896 DOI: 10.1051/jphyscol:19766189