00670cam a22002411 4500 agr43000073 DLC 20260227111001.0 761203s1942 xx 000 0 eng agr43000073 (OCoLC)2594794 DLC O OCoLC DLC premarc S621 .N5 631.6 Nicholson, Harry Helstrip. The principles of field drainage. Cambridge [Eng.] University press, 1942. 165 p. illus. 22 cm. "A bibliography of field drainage" : p. 162. Drainage Great Britain. Field drainage. 10231 10231