Manullang, H.M. and Khairul, K. 2020. Growth Pattern Study of Slender Walking Catfish (Clarias nieuhofii) as Environmental Biology Indicator. Jurnal Mangifera Edu. 5, 1 (Jul. 2020), 1-7. DOI:https://doi.org/10.31943/mangiferaedu.v5i1.97.