FIELD EVAPORATION OF n-Ge (111) IN HYDROGEN AND DECOMPOSITION OF GeH4 IN HIGH ELECTROSTATIC FIELDS C. MAINKA, W. DRACHSEL, J.H. BLOCK and G. KOZLOWSKI J. Phys. Colloques, 50 C8 (1989) C8-135-C8-140 DOI: 10.1051/jphyscol:1989824