Khullar, D. (2018). Indian and world geography for civil services preliminary examination. CL Media.
Citace podle Chicago (17th ed.)Khullar, D.R. Indian and World Geography for Civil Services Preliminary Examination. Roorkee: CL Media, 2018.
Citace podle MLA (9th ed.)Khullar, D.R. Indian and World Geography for Civil Services Preliminary Examination. CL Media, 2018.
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