Shehab, Y., یوسف, Al Wahab, H., هیثم, Al-Bakri, H., & هدى. (2005). Effect of Geometrical arrangement on the electrical conductivity of some successive polymers (Para- polyamide - Meta polyamide). Journal of Education and Science (JES), 17(2), 1–11. https://doi.org/10.33899/edusj.2005.81211