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   2015 (15 publications)    2014 (2476 publications)    2013 (4008 publications)
   2012 (4839 publications)    2011 (4696 publications)    2010 (5053 publications)
   2009 (4929 publications)    2008 (5135 publications)    2007 (5362 publications)
   2006 (5562 publications)    2005 (5680 publications)    2004 (5169 publications)
   2003 (4929 publications)    2002 (4672 publications)    2001 (4201 publications)
   2000 (3822 publications)    1999 (3422 publications)    1998 (878 publications)
   1997 (676 publications)    1996 (613 publications)    1995 (492 publications)
   1994 (454 publications)    1993 (398 publications)    1992 (356 publications)
   1991 (312 publications)    1990 (291 publications)    1989 (234 publications)
   1988 (201 publications)    1987 (184 publications)    1986 (175 publications)
   1985 (148 publications)    1984 (97 publications)    1983 (120 publications)
   1982 (91 publications)    1981 (75 publications)    1980 (69 publications)
   1979 (53 publications)    1978 (54 publications)    1977 (56 publications)
   1976 (36 publications)    1975 (38 publications)    1974 (19 publications)
   1973 (27 publications)    1972 (26 publications)    1971 (25 publications)
   1970 (19 publications)    1969 (15 publications)    1968 (16 publications)
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