=LDR 22 4500 =001 1841 =082 04$a551.48 GRE =100 1\$aGreen, F. H. W. =245 10$aField drainage in Europe: a quantitative survey =260 \\$aWallingford, Oxon :$bInstitute of Hydrology,$c1979 =650 \0$aPamphlets =852 \\$bFreeman Library$h551.48 GRE