MORPHOLOGICAL CHARACTERIZATION AND TERMINAL VELOCITY OF PUMICE PARTICLES ERUPTED DURING THE MILLENNIUM ERUPTION OF CHANGBAISHAN TIANCHI VOLCANO,CHINA
YU Hong-mei, XU Jian-dong, LIN Chuan-yong
SEISMOLOGY AND GEOLOGY . 2011, (2): 440 -451 .  DOI: 10.3969/j.issn.0253-4967.2011.02.017