Ummerkutty,A N P. (1980). Karimbu ,Kasumavu ,Rubber: Sugar cane ,Cashew ,Rubber. State institute of languages.
Chicago Stili AlıntıUmmerkutty,A N P. Karimbu ,Kasumavu ,Rubber: Sugar Cane ,Cashew ,Rubber. Trivandrum: State institute of languages, 1980.
MLA AlıntıUmmerkutty,A N P. Karimbu ,Kasumavu ,Rubber: Sugar Cane ,Cashew ,Rubber. State institute of languages, 1980.
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