Country

• Bulgaria (1) 

  Belarus (1) Georgia (1) Lithuania (1) Macedonia (1) Togo (1)

Year

• 1999 (1) 

  1960 (1) 1991 (1) 1992 (2) 1994 (1) 1995 (1) 1997 (1) 1998 (1)

Themes

•  CEPT (1)
•  Nature (1)