D. Schwarz, “Water clarification using Moringa oleifera”, vol. no. W1e. German Appropriate Technology Exchange (GATE) /Deutsche Gesellschaft für Technische Zusammenarbeit (GTZ), Eschborn, Germany, p. 7 p. : 1 fig., 1 photogr., 2000.
P. P. Mowli, “Drumstick seed as a coagulant”, in Infrastructure for low-income communities : proceedings of the 16th WEDC conference : Regional Centre for Urban and Environmental Studies (RCUES), Osmania University, Hyderabad, India, 27-31 August, 1990, 1991, pp. P. 131-134: 1 fig., 2 tab.