You can find it on Discogs

Both Wikipedia and Discogs have information about Nas' discography. Discogs lists all his past releases and a brief biography. Wikipedia has an extensive biography and clickable discography.

According to Discogs the single version of Survivor's "Eye Of The Tiger" is 3:45. The album version is listed as 4:05.

One can find a lot of information about the Bulletboys on the large amount of websites devoted to music. Discogs for example will have their entire collection listed.

One can find information on Rastaman online. Some of the useful websites that contain information on Rastaman are Wikipedia, Allmusic, Discogs and Legacy.