Manual of Library Economy Third and Memorial Edition
chapter xxii., 1911.
Small, Herbert. Handbook of the New Library of Congress, 1901.
Stewart, J. D., and Others. Open Access Libraries, 1915, chapter ii.
Ward, G. O. The Practical Use of Books and Libraries, 1917, 2 vols.
Wiswell, L. O. How to Use Reference Books, 1916.
For articles see Cannons: E 79-83, Reference Rules, Management and Policy, etc.; D 7, Planning; L 66, Books for Reference Libraries.