Najmiddinov , R.; Shamshidinov , I.; Kodirova , G.; Sayfiddinov , O. PURIFICATION OF PHOSPHORIC ACID BASED ON PHOSPHORITES OF CENTRAL KYZYL KUM IN THE PROCESS OF EXTRACTION WITH CALCIUM CARBONATE AND OBTAINING FROM A SINGLE PHOSPHORUS FERTILIZER. CAJAR 2023, 1, 47-57.