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2 | Plug & Transplant Production A Grower?s Guide. R. C. Styer (edt.) Ball Publishing, 335 North River Street, Batavia, İllions 60510 USA. |
3 | Fordham, R. and A.G. Biggs. 1985. Principles of Vegetable Crop Production. Collins Professional and Technical Books. Wilham Collins Sons and co. Ltd. London. Styer, R. C. and Koranski, D.S. 1997. |