Nos. 5530 and 5533, in Court of Appeals of D.C.; Nelson Brothers Bond and Mortgage Company (station WIBO), appellant volume Federal Radio Commission, Johnson-Kennedy Radio Corporation, corporation, intervener; Strawbridge and Clothier, intervener; and North Shore Church (station WPCC), appellant volume Federal Radio Commission, Johnson-Kennedy Radio Corporation, corporation, intervener; Strawbridge and Clothier, intervener : Brief on behalf of Federal Radio Commission.