Sen, P. K. e., & Sen, P. K. (1985). Concepts and methods in geography 1985. Institute of Geography.
Style de citation Chicago (17e éd.)Sen, Prabhat Kumar ed, et Prabhat Kumar Sen. Concepts and Methods in Geography 1985. Institute of Geography, 1985.
Style de citation MLA (9e éd.)Sen, Prabhat Kumar ed, et Prabhat Kumar Sen. Concepts and Methods in Geography 1985. Institute of Geography, 1985.
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