- William P. Collins. Bahá'í Classification Schemes (2001). Explanation of the expanded filing scheme for Bahá'í topics used at the Bahá'í World Centre Library, and outlines of two other classification schemes which could be adopted by private Bahá'í archives.
- William P. Collins. Library and Archival Resources at the Bahá'í World Centre (1985:12). Overview of the nature of the Bahá'í World Centre; historical resources at the BWC; Centre for the Study of the Holy Texts; access to BWC resources; classification schemes.
- Paul Gerard. "Phoenix Schedule" for the Dewey '200s', Suggested in particular for Bahá'í Libraries, A (2000). On the structure and limitations of the Dewey Decimal Scheme, with a detailed expanded subset for Bahá'í material.
- Universal House of Justice. Texts, Sacred, Numbers and Classifications of (2002/2010/2013). Three letters, from 2002, 2010, and 2013, about numbers of Sacred Texts catalogued by the Bahá'í World Center and their classification into "authenticated," "revised," and "transcribed."
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