Independent union member tells of NLRB's refusal to certify gas workers' organization. Washington, D.C., July 5. Joseph C. Nash, member of the Independent Gas Workers' Union, organized at the Brooklyn Union Gas Co. in New York, described today to the Senate Education and Labor Committee the attempts of his organization to obtain certification from the NLRB, although a petition for certification was filed over a year ago. The board's refusal to grant the petition, he said, could be blamed upon its 'pro- C.I.O. bias.' Senator Allen Ellender read into the record a letter from the union's attorney stating that Nash did not speak for the union, but represented solely himself