Varma, O. P. New paradigms of exploration and sustainable mineral development: Vision 2050.
शिकागो स्टाइल उद्धरणVarma, O. P. New Paradigms of Exploration and Sustainable Mineral Development: Vision 2050.
एमएलए उद्धरणVarma, O. P. New Paradigms of Exploration and Sustainable Mineral Development: Vision 2050.
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