Nonhlazeko Loveday Nxumalo, Lawrence Mzukisi Madikizela, Hendrik Gert Kruger, Stanley Chibuzor Onwubu and Phumlane Selby Mdluli (2020) “Development of a paper-based microfluidic device for the quantification of ammonia in industrial wastewater”, Water SA, 46(3 July). doi: 10.17159/wsa/2020.v46.i3.8661.