G. K. Folkard, Sutherland, J. P., y Grant, W. D.,
«Natural coagulants for appropriate water treatment : a novel approach»,
Waterlines, an international journal of water, sanitation and waste, pp. p. 30-32: fig., photogr., 1990.
G. K. Folkard, Sutherland, J. P., y Grant, W. D.,
«Natural coagulants for small scale water treatment : potential applications»,
ASEP newsletter, pp. p. 1-2, 10, 14: fig., tab., 1990.
