Cutter, C. A. Author Marks. In his Expansive Classification, 1891-93, p. 139.
—— Three-Figure Alfabetic-order Table. Library Bureau.
Dewey, Melvil. Decimal Classification (last ed.), Intro. and Appendix. Institut International de Bibliographie. Classification Décimale, fascicule i.
Sayers, W. C. Berwick. Notation. In his Introduction to Library Classification, 1918, p. 68.
255. Classification and Shelf Guides
255. Classification and Shelf Guides:
Coutts, H. T. Classification and Shelf Guides. In Stewart, J. D., and others, Open Access Libraries, 1915.
Sayers. Introduction, chapter xii. (vide supra).
Dewey, Melvil. Shelf List. In his Library School Rules, 1892.
For Articles, see Cannons, H 96-108, Shelf Arrangement, etc.