Permanence of paper for printed library materials
Secretariat, Council of National Library and Information Associations ; approved August 27, 1984, American National Standards Institute, Inc
(American national standards for information sciences, ; Z39 ; 48-1984)
ANSI, c1985
"January 1985"--P. 4 of cover
"ANSI Z39.48-1984."
American National Standards Institute