au.\*:("PEROLD RP")
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COMPUTER DESIGN OF MICROIRRIGATION PIPE SYSTEMSPEROLD RP.1979; PROC. AMER. SOC. CIV. ENGRS, J. IRRIG. DRAIN. DIV.; USA; DA. 1979; VOL. 105; NO 4; PP. 403-417; BIBL. 8 REF.Article
DESIGN OF IRRIGATION PIPE LATERALS WITH MULTIPLE OUTLETS.PEROLD RP.1977; PROC. AMER. SOC. CIV. ENGRS, J. IRRIG. DRAIN. DIV.; U.S.A.; DA. 1977; VOL. 103; NO 2; PP. 179-195; BIBL. 9 REF.Article
ECONOMIC PIPE SIZING IN PUMPED IRRIGATION SYSTEMSPEROLD RP.1974; PROC. AMER. SOC. CIV. ENGRS, J. IRRIG. DRAIN. DIV.; U.S.A.; DA. 1974; VOL. 100; NO NO 4; PP. 425-441; BIBL. 11 REF.Article