1. M. Sarwar:
Pakistan Council of Scientific & Industrial Research, PCSIR Laboratories, Lahore, Pakistan
2. A. Rashid:
Pakistan Council of Scientific & Industrial Research, PCSIR Laboratories, Lahore, Pakistan
3. M. Azam:
Pakistan Council of Scientific & Industrial Research, PCSIR Laboratories, Lahore, Pakistan
4. S. Ali:
Pakistan Council of Scientific & Industrial Research, PCSIR Laboratories, Lahore, Pakistan