J . DE WEERD
IMPROVEMENT OF MAINTENANCE OF SUBSURFACE DRAINAGE SYSTEMS IN EGYPT - CAIRO 1977 - 30 CM - TECHNICAL REPORT ; 77 .
SECOND REPORT
MWRI LIB
354.4605312 / APP
IMPROVEMENT OF MAINTENANCE OF SUBSURFACE DRAINAGE SYSTEMS IN EGYPT - CAIRO 1977 - 30 CM - TECHNICAL REPORT ; 77 .
SECOND REPORT
MWRI LIB
354.4605312 / APP