JEDDAH, 25 January -- A high-level Saudi government and business delegation arrived in Switzerland yesterday to attend the Davos Economic Forum which starts today in the presence of more than 30 heads of state and 70 non-governmental organizations.  The delegation is led by Prince Abdullah ibn Faisal ibn Turki, governor of the General Investment Authority, and includes Minister of Finance and National Economy Dr. Ibrahim Al-Assaf and Minister of Petroleum and Mineral Resources Ali Al-Naimi, and Secretary-General of the Supreme Economic Council Dr. Abdul Rahman Al-Tuwaijiri. (A.N.)