This arrangement is by Vladimir Mustajbašić. Here is the first page of the conductor's score.
As with all the music on this website, the arrangement is hereby released into the public domain. It may be freely copied and performed provided the music remains unchanged and the arranger is duly acknowledged. You can download the 
Albinoni's Adagio Conductor's Score here. The parts may be downloaded here.
This music has an interesting history. Although widely ascribed to Albinoni, an Italian composer of the Baroque period, it was actually written by his biographer around 1945 based on a few fragments he discovered. Remo Giazotto, a musicologist who was at that time writing a biography of the composer, reportedly reconstructed" the music based on the bass line and only six bars of original melody!
