Nieuwenhuis, H.S.

Nieuwenhuis, H.S., 1989. Rada Integrated Rural Development Project : groundwater investigations seventh phase : geophysical survey in the Al Bayda Province, January 1987 - November 1988, (Technical note / Rada Integrated Rural Development Project no. 33) Arnhem, The Netherlands: Ilaco. Available at: https://es.ircwash.org/sites/default/files/823-YERA89-7789.pdf.