▁Old ▁T app an , ▁N . J .: ▁Est onian ▁Phil atel ic ▁Society ▁in ▁New ▁York , ▁ 1 9 8 6 ▁▁ 7 6 8 p . ▁and ▁a ▁ 1 9 8 8 ▁supp lement . ▁ ▁La as , ▁Karl - Val do . ▁Bibli ography ▁and ▁index ▁of ▁Est onian ▁phil atel ic ▁literature . ▁Toronto : ▁K - V ▁La as , ▁ 1 9 9 6 ▁ ▁Matt ila , ▁Es a . ▁Vir on ▁post im ak su ja , ▁ 1 9 1 8 - 1 9 4 0 ▁= ▁Post al ▁rates ▁of ▁Est onia , ▁ 1 9 1 8 - 1 9 4 0 . ▁La ht i : ▁Su omen ▁Fil atel ist ili itto ▁- ▁Fin lands ▁Fil atel ist for bund , ▁ 1 9 8 7 ▁ 1 1 2 p . ▁ ▁External ▁links ▁▁ ▁Est onian ▁Phil atel ic ▁Society ▁in ▁Sweden ▁ ▁Est onian ▁Post ▁ ▁Est onian ▁Post al ▁History ▁ ▁Online ▁exhibition ▁of ▁Est onian ▁st amps ▁and ▁postal ▁history ▁ 1 9 1 8 ▁- ▁ 1 9 4 0 ▁on ▁Ex pon et ▁ ▁Category : Ph il ately ▁of ▁Est onia ▁Est onia <0x0A> </s> ▁The ▁Super ior ▁Red ▁So x ▁were ▁a ▁Minnesota – W is consin ▁League ▁( 1 9 1 0 – 1 9 1 1 ), ▁Central ▁International ▁League ▁( 1 9 1 2 ) ▁and ▁Northern ▁League ▁( 1 9 1 3 –