See the Loom of Reality and A Partial Inventory of the Works of the Central Figures of the Bahá'í Faith. Phelps' database interface is at loom.loomofreality.org, and the Library's database at bahai-library.com/inventory. See also Abbreviations of the Bahá'í Writings.

Note: All sources in the attached PDF file are indexed by page or section numbers in Volume 2 of the Partial Inventory.