000 00293 a2200121 4500
080 _a631.459:631.61
_bA 672 S
245 1 _aSoil conservation
_cby S.G. Archer
260 _aNorman
_c1956
650 _aSoil Conservation
100 1 _aArcher, S.G.
_d
300 _a305 p. & 8 pls.
901 _a51128
999 _c44302
_d44302