No. 82-4294. December 12, 1983. Laurence Gold, Washington, D.C., John R. Tadlock, Denver, Colo., Marsha S. Berzon, San Francisco, Cal., for petitioner. Pope, Ballard, Shepard Fowle, Edward B. Miller, Chicago, Ill., for amicus curiae U.S. Chamber of Commerce. Elliott Moore, Deputy Associate Gen. Counsel, Allison W. Brown, Jr., N.L.R.B., Washington, D.C., for respondent. James A. Strain, George J. Zazas, Indianapolis, Ind., for Amoco Production Co. Petition for Review of an Order of the National Labor