Matulessy, Y., Awan, A. and Liline, S. (2021) “The density of Siasia (Sipunculus nodus) population based on the differences in the substrate of the sea grasses beds on the waters of Saparua Island”, BIOEDUPAT: Pattimura Journal of Biology and Learning, 1(1), pp. 11-16. doi: 10.30598/bioedupat.v1.i1.pp11-16.