Asyar, U. A. B. “Effect of Giving Crab Shells As a Source of Chitin on the Yellow Cyst Nematode (Globodera Rostochiensis W) Population on Potato (Solanum Tuberosum L.)”. Contributions of Central Research Institute for Agriculture, vol. 15, no. 4, Oct. 2021, pp. 95-100, doi:10.59651/cceria.v15i4.47.