分面浏览：发表日期 |
| 当前检索式 | ((ALL：假说)) |
| 限定条件 | ((专题：北京大学)) |
| 2017 1 | 2016 4 | 2015 4 |
| 2014 6 | 2013 4 | 2012 35 |
| 2011 7 | 2010 7 | 2009 8 |
| 2008 4 | 2007 3 | 2006 2 |
| 2005 4 | 2004 3 | 2003 3 |
| 2002 6 | 2001 10 | 2000 5 |
| 1999 1 | 1998 1 | 1997 4 |
| 1995 2 | 1994 2 | 1993 1 |
| 1992 1 | 1991 1 | 1989 1 |
| 1988 1 | 1987 1 | 1986 2 |
| 1985 1 | 1983 1 | 1982 1 |
| 1980 1 | 1976 1 | 1962 1 |
| 1958 1 |
