Biblio

N. L. I. L. A. C. O. - Arnhem, YE, Y. Ministry o, and DGIS, D. General fo, “Proceedings of the seminar 'From depletion to a prudent use of groundwater', Rada, Republic of Yemen, 18-20 June 1990”. Ilaco, Arnhem, The Netherlands, p. iii, 159, 207 p.: fig., photogr., tab., 1990.

N. L. I. L. A. C. O. - Arnhem, YE, Y. Ministry o, and DGIS, D. General fo, “Rada integrated rural development project : inventory study : report phase I”. Ilaco, Arnhem, The Netherlands, p. ii, 42 p. + 131 p. annexes: fig., map, tab.