1. M. Hanif:
Pakistan Council of Scientific & Industrial Research, PCSIR Laboratories, Lahore, Pakistan
2. I. Ijaz:
Pakistan Council of Scientific & Industrial Research, PCSIR Laboratories, Lahore, Pakistan
3. M. Ahmad:
Pakistan Council of Scientific & Industrial Research, PCSIR Laboratories, Lahore, Pakistan
4. S. Qureshi:
Pakistan Council of Scientific & Industrial Research, PCSIR Laboratories, Lahore, Pakistan