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Yen, N.T. and Tri, L.V. 2014. Economic effects of the organic-microorganism complex fertilizer (omc) supply and the fito-leafat spray on the growth and the development of cabbage and chinese lettuce grown in Dong Anh district, Hanoi city. Academia Journal of Biology. 27, 4 (Nov. 2014), 81–87. DOI:https://doi.org/10.15625/0866-7160/v27n4.5292.