IHNS OpenIR
Current Search ((ALL:科技史 地学史))
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2012 4 2011 3 2010 2
2009 2 2003 2 2002 3
2001 1 2000 9 1999 4
1998 7 1997 2 1996 4
1995 10 1994 7 1993 31
1992 40 1991 16 1990 57
1989 16 1988 19