Hess, G. R. (1967). Sam Higgin Bottom of Allahabad: Pioneer of Point four to India. The University of Virginia.
शिकागो स्टाइल उद्धरणHess, Gary. R. Sam Higgin Bottom of Allahabad: Pioneer of Point Four to India. Charlottesville: The University of Virginia, 1967.
एमएलए उद्धरणHess, Gary. R. Sam Higgin Bottom of Allahabad: Pioneer of Point Four to India. The University of Virginia, 1967.
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