Actually, these are the chord changes:
Verse: Am........Dm.......
//// //// //// ////
Am...E....Am.......
//// //// //// ////
Am........Dm.......
//// //// //// ////
Am...E....Am.......
//// //// //// ////
Chorus: F.........C........
//// //// //// ////
Dm........Am.......
//// //// //// ////
Am...E....Am.......
//// //// //// ////
F....C....Dm...Am..
//// //// //// ////
Am...E....Am.......
//// //// //// ////
From "Songs of Peace, Freedom, and Protest"