"stern, peter h. "
operation and maintenance of small irrigation schemes: / peter.h. stern - 1 ed. - uk : russell 1988. - "v, 45p.; 21 cm."
0 946688 74 5
627. 52 ste
operation and maintenance of small irrigation schemes: / peter.h. stern - 1 ed. - uk : russell 1988. - "v, 45p.; 21 cm."
0 946688 74 5
627. 52 ste