J. E. M. Smet, Lammerink, M. P., Brikke, F., Bredero, M., Belli, A., and Engelhardt, B., “Evaluation report Nicaraguan experiences with rope pump : final report”. IRC, The Hague, The Netherlands, p. ca. 110 p. : fig., tab., 1995.

J. E. M. Smet, Brikke, F., Bredero, M., Belli, A., Engelhardt, B., and Lammerink, M., “Informe de evaluacion de las experiencias Nicaraguenses con la bomba de mecate : informe final”. IRC, The Hague, The Netherlands, p. ca. 110 p. : fig., tab., 1995.