I'm looking for the sheet music book for the "Ring Ring" album. I know the book exists because it is available at the National Library of Sweden. I also found it in two libraries in Denmark, but of course the libraries won't sell it.
The complete title of the book is : "Ring Ring [Musiktryck] : Björn, Benny & Agnetha, Frida : 11 melodier inspelade av Björn & Benny, Agnetha & Frida". The book was published in Stockholm in 1973 by Union Songs/Sweden Music AB. I already have all the other album songbooks from "Waterloo" to "The Visitors" and would really like to complete my collection. So if you could give me any hint on where to find this, your help would be very much appreciated!