Kumbal,, D. S. (1992). Encyclopaedia of popular science: Vol.4. Akash Deep.
Chicago Edition CitationKumbal,, Dexter S. Encyclopaedia of Popular Science: Vol.4. Delhi: Akash Deep, 1992.
MLA Edition CitationKumbal,, Dexter S. Encyclopaedia of Popular Science: Vol.4. Akash Deep, 1992.
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