Prof. Dr. J. R. von Ronnen

Dedicated upon his Retirement from the Chair in Radiology, Leyden University, from his Friends and Pupils of the Leyden Radiological Department. "Radiologia Clinica", Vol 45, No 2-4 (pp. 65-344), 1976. Special Topic Issue: Vol. 45, No. 2-4 (1976): Radiologia Clinica