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Vashishta, P. C., Sinha, A. K., & Kumar, A. (2006). Botany for degree students: Pteridophyta (vascular cryptogams) (Multicolour illastrative rev. ed.). Kolkata: S. Chand.

Vashishta, P. C., A. K. Sinha, and Anil Kumar. Botany for Degree Students: Pteridophyta (vascular Cryptogams). Multicolour illastrative rev. ed. Kolkata: S. Chand, 2006.

Vashishta, P. C., A. K. Sinha, and Anil Kumar. Botany for Degree Students: Pteridophyta (vascular Cryptogams). Multicolour illastrative rev. ed. Kolkata: S. Chand, 2006.