Biblio

J. H. C. M. Oomen y Schellinkhout, A., «Anaerobic sewage treatment in Colombia : UASB, a feasible option in warm climates», Land + water international : NEDECO magazine on water, transport, infrastructure and environment, pp. p. 13-15: 1 fig., 4 tab., 2 photogr., 1992.

A. Schellinkhout y Jakma, F. F. G. M., «Ervaring met anaerobe zuivering in Bucaramanga, Colombia», presented at the 1991-06-12, Amersfoort, The Netherlands, 1991, p. 13 p. : fig., tab.