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	1.	Drainage guide improvements for better drainage design by Ocha, W.J Lucas, P.E [coaut.] Wenberg, R.D [coaut.] Material type: Text Language: En Publication details: 1982 In: Advances in drainage: proceedings, Fourth National Drainage Symposium, December 13-14, 1982, Palmer House, Chicago, Illinois. St. Joseph, Mich. (USA). American Society of Agricultural Engineers. 1982. p. 62-6884-065671 Availability: Items available for loan: CIMMYT Knowledge Center: John Woolston Library (1)Call number: 84-065671. Place hold Log in to add tags Add to cart (remove)
	2.	USDA Soil Conservation Service criteria for subsurface drain filters or envelopes by Wenberg, R.D Talbot, J.R [coaut.] Material type: Text Language: En Publication details: 1987 In: Drainage design and management : proceedings of the Fifth National Drainage Symposium, December 14-15, 1987, Hyatt RegDEy Chicago in Illinois Center. St. Joseph, Mich. (USA). American Society of Agricultural Engineers. 1987. p. 424-43189-110987 Availability: Items available for loan: CIMMYT Knowledge Center: John Woolston Library (1)Call number: 89-110987. Place hold Log in to add tags Add to cart (remove)

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