KAPLAN, MUSTAFA, SAHRIYE SONMEZ, ERSIN POLAT, and HALIL DEMIR. “Effects of Organic and Mineral Fertilizers on Yield and Nutritional Status of Lettuce”. Asian Journal of Chemistry 20, no. 3 (March 30, 2010): 1915–1926. Accessed July 20, 2024. https://asianpubs.org/index.php/ajchem/article/view/19170.