Ali, S., Sarwat Ismail, Shahnaz Dawar, S. Ghulam Musharraf, Zulfiqar Mirani and Shahid Bhutto 2020. Effect of Crude Oil Concentrations on Growth and Photosynthetic Pigments of Helianthus Annus Bio-Augmented with Micrococcus luteus and Pseudomonas aeruginosa . International Journal of Economic and Environmental Geology. 11, 3 (Sep. 2020), 39–48. DOI:https://doi.org/10.46660/int.j.econ.environ.geol. v11i3.873.