Indexes only, useful for (1) referencing the diacritics and transliteration of Tablet names, and (2) knowing in which books Taherzadeh discusses which tablets.
These books are available online in Ocean
(unformatted) and at peyman.info
Indexes of Tablet names:
Revelation of Bahá'u'lláh
published in Revelation of Bahá'u'lláh
, Volumes 1-4