Vellayani Arjunan. (1993). Sarvavijnanakosham (v.4). State institute of encyclopaedic publications.
Chicago Edition CitationVellayani Arjunan. Sarvavijnanakosham (v.4). Thiruvananthapuram: State institute of encyclopaedic publications, 1993.
MLA Edition CitationVellayani Arjunan. Sarvavijnanakosham (v.4). State institute of encyclopaedic publications, 1993.
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