It's very exciting to hear from someone in Iran. How did you hear about
permaculture? Are you a university student?
I wish that I had some books to send you. Perhaps I can photocopy some
material for you. I recommend, "Introduction to Permaculture," by Bill
Mollison, "The Natural Way of Farming," by Masanobu Fukuoka, "Fertility
Pastures," by Newman Turner (I hear that grazing by sheep and goats is
highly subsidized by many governments in the middle east and causing plenty
of problems), and "Gaia's Garden," by Toby Hemenway.
Also there are several articles available for reading on line at
csf.colorado.edu/perma/