分面浏览：发表日期 |
| 当前检索式 | ((ALL：P-GROUPS)) |
| 限定条件 | ((专题：北京大学)) |
| 2017 42 | 2016 38 | 2015 36 |
| 2014 26 | 2013 29 | 2012 24 |
| 2011 35 | 2010 18 | 2009 20 |
| 2008 29 | 2007 17 | 2006 21 |
| 2005 36 | 2004 19 | 2003 20 |
| 2002 23 | 2001 19 | 2000 13 |
| 1999 10 | 1998 10 | 1997 7 |
| 1996 3 | 1995 2 | 1994 5 |
| 1993 3 | 1992 2 | 1991 4 |
| 1989 1 | 1988 3 | 1987 3 |
| 1986 2 | 1984 1 | 1983 2 |
