Roots and Branches
Not only did these two bands set the stage for the mellow country-rock of the '70s (Eagles, Pure Prairie league, Marshal Tucker, Poco...)but they affected every bluegrass and country musician since. Especially after the Dillards landmark "Will the Circle be Unbroken" lp. Both bands helped to blur the lines between the genres. They changed and traded personnel throughout their long histories. The names are legendary; Doug and Rodney Dillard, Gram Parsons, Roger McGuin, John Hartford, Chris Hillman, Herb Pederson, David Crosby, Clarence White,...
For more info on the Byrds, check out the wealth of info here.
And for the Dillards, try here.
You can still buy many Dillards and Gram Parsons cd's and lp's at Sierra Records.