PHYSICO-CHEMICAL AND SOME HEAVY METALS CONCENTRATION ANALYSES ON THREE COMMON SPECIES OF FISH IN TUNGAN KAWO RESERVOIR KONTAGORA, NIGER STATE, NIGERIA. FJS [Internet]. 2021 Jun. 26 [cited 2025 Sep. 17];5(1):223-32. Available from: http://162.254.38.185/index.php/fjs/article/view/559