Alligator / Mountain Jam

I was listening to the gd hour this morning and heard the "First There Is A Mountain" (a.k.a. "Mountain Jam") quote/tease on Alligator from 1/22/68 Eagle's Auditorium, Seattle WA. I've heard these before but I never realized before this morning that they were pre-Allman Brothers. I quess Duane

Workingman's Blues

Isn't "Workingman's Blues" a Merle Haggard tune?