Maher Najm Abdullah, Mohammed Rashid Abood and Amera Ismael Hussain 2022. The suitability of Sinjar and Pila spi rocks for building and as railway ballast stone for the Bazian anticline fold in the Sulaymaniyah governorate. Tikrit Journal of Pure Science. 27, 1 (Dec. 2022), 36–40. DOI:https://doi.org/10.25130/tjps.v27i1.80.