GEONEX SEES SALES HURT BY PRODUCTION SHIFT Geonex Corp <GEOX> said BellSouth Corp <BLS> unit Southern Bell Telephone and Telegraph Co's decision to postpone the start up of new conversion assignments at Geonex's Chicago Aerial Survey unit could negatively affect its fiscal 1987 revenues. The company said it had expected higher revenues from the records conversion work, but it now foresees revenues from Southern Bell work at about eight mln dlrs, the same level as last fiscal year. Geonex said Southern Bell will let CAS continue work in progress and it expects to perform mechanized posting and records conversion for Southern Bell through 1989. But, it added that the Southern Bell decision has forced it to pursue opportunities with other telephone companies and municipalities to replace the Southern Bell work.