Råg i Ryggen were a Swedish heavy metal / progressive rock bands with big Black Sabbath and Uriah Heep vibes. They realesed their one and ony album in 1975 which sold very bad and they were dropped off their label and later disbanded. The guitarist Björn "Nysse" Nyström later went to tour with the Swedish punk rocker Magnus Uggla in the late 70's and started a new 80's rock band called Strix Q.
Sadly, Råg i Ryggen aren't that "well known" as other Swedish old skool heavy metal bands like Gotham City, Neon Rose or Heavy Load. I think they are very overlooked and that they need more attention!
Here are YouTube links to some of their songs:
"Land Over the Rainbow" (live)
"Det kan väl inte vara farligt"
"Naked Man"