Analysis of the fertility level of Bedadung river Jember:  Literature study through primary productivity measurement. Kalijaga J. Penelit. Multidisiplin Mhs. [Internet]. 2025 May 31 [cited 2025 Jun. 7];1(2):49-53. Available from: https://kalijaga.aksarashofa.com/index.php/kalijaga/article/view/32