hatanga-Popigay         01
Olenek                  02
Lena                    03
Yana                    04
Indigirka               05
Yenisei                 06
Kolyma                  07
Taz                     08
MacKenzie               09
Pechora                 10
Ob                      11
Severnaya_Dvina         12
Anadyr                  13
Yukon                   14
Nelson                  15
Ural                    16
Amur                    17
Fraser                  18
Saint_Lawrence          19
Volga                   20
Dnieper                 21
Don                     22
Columbia                23
Danube                  24
Yellow_River            25
Colorado                26
Yangtze River           27
Mississippi             28
Nile                    29
Shatt-al-Arab           30
Rio_Grande              31
Indus                   32
Ganges                  33
Pearl_River             34
Irrawaddy               35
Salween                 36
Senegal                 37
Mekong                  38
Orinoco                 39
Magdalena               40
Volta                   41
Niger                   42
Juba                    43
Amazon                  44
Tocantins               45
Zaire(Congo)            46
Sao_Francisco           47
Victoria                48
Zambezi                 49
Oranje                  50
Parana                  51
Murray_1                52
Colorado                53