Alshebani, A., and I. Abdolrhman. “Microbial Pollution and Heavy Metals in the Work Environment of the College of Engineering and ‎Technology Sciences – Sebha University - Libya ‎ ‎(Computer Keyboard As a Case Study)‎”. Palestine Technical University Research Journal, vol. 9, no. 4, Dec. 2021, pp. 180-91, doi:10.53671/pturj.v9i4.173.