Further Study of a Ring-Like Event Observed in Mountain Emulsion Chamber Cailiu, J. ; Guiru, J. ; Huo, A. ; Kuang, H. H. ; Linkai, D. ; Lu, S. L. ; Qingqi, Z. ; Ren, J. ; Su, S. ; Wang, Y. X. Abstract Publication: International Cosmic Ray Conference Pub Date: 1987 Bibcode: 1987ICRC....5..343C