Sinambela, E., Abdul Gafur and Burhan Hafid (2026) “Experimental Study of the Performance of the Calpeda B Cm 20e Type Centrifugal Pump as a Practical Tool”, International Journal of Science and Environment (IJSE), 6(2), pp. 2107–2114. doi: 10.51601/ijse.v6i2.731.