"Rise Up Singing," lauded by Jim. My 1992 edition, has "words, chords & sources for 1200 songs." Margins of the cover are blue so this one could be the one mentioned in the first post, but dimensions are smaller. Strong spiral binding (also paperback and library binding editions).
Edited by Peter Blood and Annie Patterson (Dealers often list the editor as Pete Seeger, but he wrote only the introduction). A Sing Out Publication.

Like FSWB, it is essential. Some lyrics are abbreviated.

The 2004 printing is on sale at Amazon for $18.87 spiral bound and $14.92 paperback. The 1988-1992 editions used are available through Abebooks at $10.00 up, but look for those with the spiral binding.