000 00290 a2200121 4500
080 _a631.62
_bN 625 P
245 1 _aPrinciples of field drainage
_cby H.H. Nicholson
260 _aLondon
_c1942
650 _aField Drainage
100 1 _aNicholson, H.H.
_d
300 _a165 p.
901 _a16391
999 _c45089
_d45089