Claim: Mountain Jam was written by The Allman Brothers Band and was only released on a single record label.
Evidence: "Mountain Jam" was originally released in 1972 on the album Eat a Peach, as recorded at the Fillmore East concert hall in March 1971 during the same sessions that produced their prior live double album At Fillmore East. Other live recordings were released on the albums Fillmore East, February 1970, Live at Ludlow Garage: 1970, Live at the Atlanta International Pop Festival: July 3 & 5, 1970, The Fillmore Concerts, and deluxe edition of At Fillmore East (1971). 
1991 (Ludlow), 2003 (AIPF), July 1971 (Fillmore), 1972 (Eat A Peach)