DESY-PETRA. MARK-J Collaboration. Measurement of alpha-s to complete second order using the planar-triple-energy correlation (PTC) technique. 2 1/PB AT 14 GEV. 3.2 1/PB AT 22 GEV. 88 1/PB AT 35 GEV. 31 1/PB AT 39.79 & lt; SQRT(S) & lt; 46.78 GEV. SECOND ORDER QCD CALCULATIONS OF PLANAR-TRIPLE-ENERGY CORRELATIONS. TWO DIFFERENT FRAGMENTATION MODELS (INDEPENDENT AND STRING) WERE USED. INDEPENDENCE OF RESULT FROM FRAGMENTATION MODEL HAVE BEEN SHOWN. ; Other ; No description provided.