-
541
-
542
-
543
-
544
A practical guide to irrigation canal design
Published in Philippine Engineering Journal (1980)Article -
545
-
546
The Irrigators Service Association its impact on rice crop intensity and cultural management practices [microform]
Published 1980Visual Material -
547
-
548
Report of a planning workshop on irrigation water management.
Published 1980Table of contents only
Book -
549
-
550