Hydroponics: the Bengal system with notes on other methods of soils cultivation [printed text] / DOUGLAS, J.S. ; , . - 5th ed. . - Delhi : Oxford University Press, 1959 . - , xvi, 185p. :ill, ,. Languages : (En)
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Hydroponics: the Bengal system with notes on other methods of soils cultivation [printed text] / DOUGLAS, J.S. ; , . - 5th ed. . - Delhi : Oxford University Press, 1959 . - , xvi, 185p. :ill, ,. Languages : (En)
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