S. Z. Hussain; S. K. Durrani; S. K. Durrani; M A. Hussain; N. Hussain; M. Ahmad(Peshawar: Materials Research Laboratory Department of Physics University of Peshawar, Pakistan, 2010-06-06)
Salma Gul; Anwar-ul-Haq Ali Shah; Salma Bilal(Peshawar: Materials Research Laboratory Department of Physics University of Peshawar, Pakistan, 2010-07-03)