A. K. SRIVASTAVA AND P. K. TYAGI. (2011). PRACTICAL AGRICULTURAL METEOROLOGY. New Delhi Publishing Agency, NEW DELHI.
Lua i Stíl Chicago (17ú heag.)A. K. SRIVASTAVA AND P. K. TYAGI. PRACTICAL AGRICULTURAL METEOROLOGY. New Delhi Publishing Agency, NEW DELHI, 2011.
Lua MLA (9ú heag.)A. K. SRIVASTAVA AND P. K. TYAGI. PRACTICAL AGRICULTURAL METEOROLOGY. New Delhi Publishing Agency, NEW DELHI, 2011.
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