Haqa, I.- ul-., University, G. C., Qadeer, M. A., & Ali, S. (2004). COMPARISON OF HYPER PRODUCER ASPERGILLUS NIGER CULTURES (IFS-5, IFS-6 AND IFS-17) FOR CITRIC ACID FERMENTATION IN SURFACE CULTURE: Short Communication. Biological Sciences - PJSIR, 47(5), 403–405. Retrieved from http://v2.pjsir.org/index.php/biological-sciences/article/view/1560