Grateful Dead

I'm looking to see who knows anything about this art, it's copyright holders, and other info.

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Dear readers,
I'm looking to find more info on this artwork; who owns the original copyrights, and where I can get permission to copy or buy it outright in the dimensions I seek. Any help would be gratefully appreciated. Also, if it's a poster, what concert it was at, or anything pertaining particularly to what all is in this photo. Thanks a million Timothy2012

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I'm looking to see who knows anything about this art, it's copyright holders, and other info.