Is this a 1976 release? It is on this site, but I've seen on a couple of other sites 1977 quoted.

My usual sources (AMG, Amazon, AM, Wikipedia) all say 1976.

Thanks. Rate Your Music had it as 1977, I've submitted a correction there.

It would appear all those sources are wrong, it should be 1977:

http://www.roots-archives.com/release/322

Or that source is wrong. Although it seems rather reliable.