Tohutoro APA (7th ed.)
Kumra, V. K., Nag, P., & Singh, J. (1997). Geography and environment. Concept Publishing.
Tohutoru Kātū Chicago (17th ed.)
Kumra, V. K., Prithvish Nag, me Jagdish Singh. Geography and Environment. New Delhi: Concept Publishing, 1997.
Tohutoro MLA (9th ed.)
Kumra, V. K., et al. Geography and Environment. Concept Publishing, 1997.
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