"stern, peter h. "
operation and maintenance of small irrigation schemes: / peter.h. stern - 1 ed. - uk : it publications 1988. - "v, 43p.; 22 cm."
0 946688 74 5
--
631. 7 ste
operation and maintenance of small irrigation schemes: / peter.h. stern - 1 ed. - uk : it publications 1988. - "v, 43p.; 22 cm."
0 946688 74 5
--
631. 7 ste