▁P ants ▁has ▁not ▁been ▁included ▁on ▁the ▁list ▁because ▁it ▁only ▁appeared ▁on ▁numerous ▁boot leg s ▁and ▁was ▁not ▁officially ▁released . ▁ ▁Studio ▁albums ▁ ▁The ▁Be e ▁Ge es ▁Sing ▁and ▁Play ▁ 1 4 ▁Barry ▁Gib b ▁Songs ▁( 1 9 6 5 ) ▁ ▁Sp icks ▁and ▁Spe cks ▁( 1 9 6 6 ) ▁ ▁Be e ▁Ge es ' ▁ 1 st ▁( 1 9 6 7 ) ▁ ▁Hor izontal ▁( 1 9 6 8 ) ▁ ▁Ide a ▁( 1 9 6 8 ) ▁ ▁Od essa ▁( 1 9 6 9 ) ▁ ▁C uc umber ▁Castle ▁( 1 9 7 0 ) ▁▁ 2 ▁Years ▁On ▁( 1 9 7 0 ) ▁ ▁T raf al gar ▁( 1 9 7 1 ) ▁ ▁To ▁Wh om ▁It ▁May ▁Conc ern ▁( 1 9 7 2 ) ▁ ▁Life ▁in ▁a ▁T in ▁Can ▁( 1 9 7 3 ) ▁ ▁Mr . ▁Natural ▁( 1 9 7 4 ) ▁ ▁Main ▁Cour se ▁( 1 9 7 5 ) ▁ ▁Children ▁of ▁the ▁World ▁( 1 9 7 6 ) ▁ ▁Sp ir its ▁Having ▁Flow n ▁( 1 9 7 9 ) ▁ ▁Living ▁E yes ▁( 1 9 8 1 ) ▁ ▁E . S . P . ▁( 1 9 8 7 ) ▁ ▁One ▁( 1 9 8 9 ) ▁ ▁High ▁Civil ization ▁( 1 9 9 1 ) ▁ ▁Size ▁Isn ' t ▁Everything