Barroroh, Himmatul, Dewi Nur Rizkiyah Rifai, and Akyunul Jannah. 2019. “Isolation and Identification of Chitin and Chitosan Horseshoe Crab Shrimp Shell Using Infrared Spectroscopy”. International Journal of Engineering & Technology 8 (1.9): 372-77. https://doi.org/10.14419/ijet.v8i1.9.26689.