De Silva, G. A. C., & Sathasivampillai, K. (1976). Potato-vegetable cultivation in Nuwara Eliya District of Sri Lanka. Govt. Dept. of Agriculture.
Citace podle Chicago (17th ed.)De Silva, G. A. C., a K. Sathasivampillai. Potato-vegetable Cultivation in Nuwara Eliya District of Sri Lanka. Peradeniya, Sri Lanka.: Govt. Dept. of Agriculture, 1976.
Citace podle MLA (8th ed.)De Silva, G. A. C., a K. Sathasivampillai. Potato-vegetable Cultivation in Nuwara Eliya District of Sri Lanka. Govt. Dept. of Agriculture, 1976.
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