YIELD OF PARENT AND FRAGMENT IONS SPUTTERED FROM ORGANIC OVERLAYERS BY LOW-VELOCITY ARGON : VARIATION WITH IMPACT ANGLE AND COVERAGE W. SZYMCZAK et K. WITTMAACKJ. Phys. Colloques, 50 C2 (1989) C2-75-C2-78DOI: https://doi.org/10.1051/jphyscol:1989214