by Charles S. Gray and others. by Stephen H. Cradall and others. by Arthur W. Lo and others. by Kao Yu-pao and others. by James A. Richards [and others]. by R. K. Bhat [and others] by Hu Sheng, Liu Danian and others. by Ju Chin Chu and others. by C. H. Bamford and others. by Charles A. Vergers.