Kerala (India). Bureau of Economics and Statistics. Industrial Statistics Unit. Annual survey of industries, Kerala State. The Unit.
Παραπομπή σε μορφή Chicago (17η εκδ.)Kerala (India). Bureau of Economics and Statistics. Industrial Statistics Unit. Annual Survey of Industries, Kerala State. Trivandrum: The Unit.
Παραπομπή σε μορφή MLA (8th εκδ.)Kerala (India). Bureau of Economics and Statistics. Industrial Statistics Unit. Annual Survey of Industries, Kerala State. The Unit.
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