reproduced by National Technical Information Service. produced by National Technical Information Service. The National Technical Information Service. U. S. Department of Energy, U. S. Department of Commerce, National technical Information Service. Anker V. Sims ; distributed by National Technical Information Service. National Technical Information Service. NTIS(National Technical Information Service. National Technical Information Service U.S.Dept. of Commerce, office of Technical Services. The U.S. Department of Commerce, National Technical Information Service Office of International affa