Here is the official description of the LBJ library and archive:
‘You are looking at a cross[-]section of the archives stack area housing the manuscript collection of Lyndon Baines Johnson. Over forty million pages are housed in acid[-]free storage boxes in a balanced humidity and temperature atmosphere.
‘The first level is congressional, senatorial and vice-presidential. The second level contains papers of friends, public figures and speech files from college days to 1973. The third level houses papers and reports of task forces, commissions and appointment committees. The fourth level contains White House Central Files.’
From Texas and Arizona, August 2009