为什么榜上没有JASIST？

按2007-2010（ h5-index h5-median） 排名，只给出了20个期刊，JASIST的H指数68 怎么没有，奇怪。
http://scholar.google.com/citations?view_op=top_venues&hl=en&vq=eng_libraryinformationscience

Journal of the American Society for Information Science and Technology
Country: United States

Subject Area: Computer Science | Social Sciences

Subject Category: Computer Science (miscellaneous)  , Information Systems  , Library and Information Sciences  

Publisher: John Wiley and Sons Inc.. Publication type: Journals. ISSN: 15322882, 15322890

Coverage: 2000-2012

H Index: 68