Whenever anyone refers to THE Anthology, this is the one they are referring to. If you are planning on a purchase based on price, I would recommend County Sales, which has it at $60, compared to $79 from Smithsonian. Of course, buying from Smithsonian directly might help advance their programs, I wouldn't know about that. If you check out Music Boulevard you will find the 84 titles listed with maybe 20 sound clips. (Their price is $71) I have seen it at about $66 at Best Buy, but since I have the records, I struggled to keep from buying it.

Searching virtually any mailorder company will find it, along with a discussion of its contribution to the rebirth of interest in old time music.