The Bahai scriptures in original hand writing of Baha'u'llah or His scribes, and other original writings are all in Bahai world center library.
Universal House of Justice, which is in Bahai world center has a research department.
When a Bahai have questions regarding anything related in Bahai scriptures or history, they write to then. Then the department searches in the scriptures and gives them. Their other job is to translate them into other languages.
Their other work, for example us history. They find out when and where a Tablet of Baha'u'llah was revealed.
I believe many works are stored here:
Bahá'í Library Online
But, you already named a couple of them, Mojan for example.