IQBAL, M. Z., and M. SHAFIQ. “?EFFECT OF CEMENT DUST POLLUTION ON THE GROWTH OF SOME TREE SPECIES”.
Biological Sciences - PJSIR
, vol. 38, no. 9-10, Oct. 1995, pp. 368-70, https://v2.pjsir.org/index.php/biological-sciences/article/view/2523.