Sunkavalli, Surya P, A Gangagni Rao, P Swapnalata, and M Zaheer. 2014. “Leaching Characteristics of Poultry Litter in First Phase of Multistage Anaerobic Digestion”. International Journal of Environment 3 (2):76-82. https://doi.org/10.3126/ije.v3i2.10516.