Seeking to order photos from General Photographic Files, 1943-1968

Hello, I have found a grouping of photographs in the 80-G, as an example in the link below.  The page says the Specific Media Type is a negative. From here, how would I determine what 'roll' this particular negative is on?  Or for that matter, to find the rolls available in a given RG, in this case local identifier 80-G for the series - View of Battered Hill of Peleliu, on Palau Island ? Thanks