The role of classification in the modern American library : papers presented at an institute conducted by the University of Illinois Graduate School of Library Science November 1-4, 1959 / University of Illinois at Urbana-Champaign. Graduate School of Library Science. Classification Books Congresses. 025.4 ILR Includes bibliographical references. Champaign, Ill. : Illini Union Bookstore [distributer], 1959. 1959. 1959 Text vii, 136 p. ; eng Allerton Park Institute (Series) ; 6