	malrite buys cox s radio station unit malrite guaranteed broadcast partners l p said it bought wtrk inc from cox enterprises inc for mln dlrs in cash it said wtrk owns and operates wtrk fm a philadelphia radio station transfer of the license for the sation has been approved by the federal communications commission malrite guaranteed said it is a limited partnerhip formed to uire and operate radio and tv stations it said malrite communications group inc malr is the general partner reuter 
