No. 8973. Argued September 27, 1963. Decided January 16, 1964. Joseph C. Thackery, Attorney, N.L.R.B. (Arnold Ordman, General Counsel, Dominick L. Manoli, Associate General Counsel, Marcel Mallet-Prevost, Asst. General Counsel, and Melvin Pollack, Attorney, N.L.R.B., on brief), for petitioner. William D. Macmillan, Sr., Baltimore, Md. (William A. Fisher, Jr., and James P. Garland, Baltimore, Md., on brief), for respondent, A.S. Abell Co. James J. Doyle, Jr., Baltimore, Md. (Sherbow, Shea Doyle and