( 1959 . ). .
- 10 , (1926), .
( 16.02.2008 . 205).
- 12 (1940 2000 .). - , , , , . : , , !, , , .
( ).
. 1869 . .
1989 . (World Wide Web, www), .
( ).
- 14 (1804 .). (251 ), , , 152, 15 .
- 14 (1879 .). , ( ). , , , , .
- 14 (International π Day). 1988 - - (San Francisco Exploratorium), - , , ( / ) 14 - 3/14 - π = 3,14...
- 14 - (International Day for Rivers). , , (International Day of Action Against Dams and for Rivers, Water and Life). .
- 15 .
80 (1937 2015 ..).
- 15 1969 . , Ը .
- , (1995 .).
- 16 (1890 1948 ..). , , .
|
|
(1856 1910 ..), .
- 17 . 2008 . () ( ).
- 18 (2015 .)
.
( ).
, ( ).
- 20 (1915 1997 ..). . XX , .
.
( 2012 ).
- 21 (1895 1982 ..). , , , , . .
- 21 .