- 'Abdu'l-Bahá in California, Ella Goodall Cooper, comp. (1912/1918). — Over 1000 pages of notes from Abdu'l-Baha's visit to California in 1912, written between 1912-1918, ...
- Daily Lessons Received at Akka: January 1908, by Helen S. Goodall, Ella Goodall Cooper (1979). — Includes translations of three Tablets of Abdu'l-Baha.
- In Memoriam, by Author unknown (1956). — William Sutherland Maxwell, Roy Wilhelm, Siegfried Schopflocher, Louis Gregory, Dorothy Baker, Mario...
- Pilgrim Accounts Collection: Compilation of 253 Pilgrims Notes, by Various (1898-1958). — Collated adaptation of an archive of 253 accounts. Most of these are already online at this site, in...
- The Cause of Universal Peace: 'Abdu'l-Bahá's Enduring Impact, by Kathryn Jewett Hogenson (2021-02-23). — On Abdu'l-Baha's interest in the Lake Mohonk Conferences on International Arbitration in New York, 1...
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