Subramanyam, K., N. P. Balakrishnan, and T. L. Saroja. 2024. “The Pteridophytes of Cumbum Valley and Pachakumatchi Hills, Madurai District, Madras State”. Nelumbo 3 (3-4):209-14. https://doi.org/10.20324/nelumbo/v3/1961/76501.