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Dyfyniad Arddull ChicagoJones, J. Benton. Hydroponics: A Practical Guide for the Soilless Grower. 2nd ed. Boca Raton: CRC Press, 2005.
Dyfyniad MLAJones, J. Benton. Hydroponics: A Practical Guide for the Soilless Grower. 2nd ed. Boca Raton: CRC Press, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.