Lenin, G. “Indole Acetic Acid Gibberellic Acid and Siderophore Production by PGPR Isolates from Rhizospheric Soils of Catharanthus Roseus”. International Journal of Pharmaceutical & Biological Archive 3, no. 4 (September 23, 2012). Accessed May 18, 2024. http://ijpba.info/index.php/ijpba/article/view/767.