slm doste aziz,ketab amar riazi parsian behtare,be nazre man age ye ketab ro khob bekhoni behtar az ine ke khodet ro ba ketabhay mokhtalef sar dar gom koni,albate ketabe amar riazi Dr behbodian ham ketab ghabele fahmi hast in do ketab ro bekhoni natijeh migiri.mn bra arshd ketab modaresan sharif...