Received:May 13, 1981  
Key Word:   
Fund ProjectL:
Author NameAffiliation
Chen Xiru University of Science and Technology of China 
Hits: 1325
Download times: 791
Abstract:
      
Citation:
DOI:10.3770/j.issn:1000-341X.1981.02.013
View Full Text  View/Add Comment  Download reader