Sheelwant Singh. (2019). Science and Technology: For civil services preliminary and main examinations. Pearson India.
Čikaški stil citiranjaSheelwant Singh. Science and Technology: For Civil Services Preliminary and Main Examinations. Noida: Pearson India, 2019.
MLA način citiranjaSheelwant Singh. Science and Technology: For Civil Services Preliminary and Main Examinations. Pearson India, 2019.
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