SERVICE RESOURCES<SRC> UNIT CUTS SORG<SRG> STAKE A group led by Chas. P. Young Co, a subsidiary of Service Resources Corp, said it cut its stake in Sorg Inc to 366,700 shares, or 16.7 pct of the total outstanding common stock, from 385,000 shares, or 17.5 pct. In a filing with the Securities and Exchange Commission, Young, which yesterday withdrew its 23 dlr a share takeover proposal, said its other group member, SDI Partners Ltd Partnership, sold 18,300 Sorg common shares between June 16 and 18 at 17-1/2 to 19 dlrs each.