Wikipedia: S. R. Ranganathan - Biography of Shiyali Ramamrita Ranganathan, the librarian and mathematician from India, who developed the Colon Classification system of library cataloging.
Shiyali Ramamrita Ranganathan - Biography of Shiyali Ramamrita (S.R.) Ranganathan, the librarian and mathematician who developed the Colon Classification indexing system.
Application of Ranganathan's Laws to the Web - Article examing how S.R. Ranganathan's Five Laws of Library Science can be applied to the online world. From the journal Webology.