BASAK, R.K. 1968. <I>Ophioglossum nudicaule</I> Linn. F. Var.<I> Macrorrhizum</I> (kze) Clausen (Ophioglossaceae): a New Record for West Bengal and Eastern India. Indian Forester. 94, 8 (Aug. 1968), 639–640. DOI:https://doi.org/10.36808/if/1968/v94i8/25903.