The position of the Iranian companions of Imam Javad (AS) in Hadith With an emphasis on Shia four books

Shia Imams for the reason of social situations, had a plan for civilization as well as leading and guiding people of their own period and endeavored forculturing and upbringing many students in order to eternize Islamic civilization. Imam Javad (AS) also for achieving such a goal brought up students whose some were from Iran. they were narrator of hadith and conveyer of Shia pure thoughts that is remained many works and narrations about them. Many of these narrations are juridical and can find them in Shia four books. This study answers to following questions through library study and in an analytic-descriptive 1.How many companions of Imam Javad (AS) were more active in the field of Hadith and narration?
2. Do the Iranian companions of Imam Javad (AS) have works in the field of Shia Hadith?
3.How many narrations (directly or indirectly by Imam Javad(AS) or other Imams) from Iranian companions of Imam Javad (AS) have come to the Four books?
4.What percent of the Four books narrations is narrated by the Iranian students of Imam Javad(AS)?