000 00281 a2200121 4500
080 _a631.4
_bW 425 P
245 1 _aProductive soils
_cby W.W. Weir
260 _aChicago
_bJ.B. Lippincott Co.
_c1946
650 _aSoils
100 1 _aWeir, W.W.
_d
300 _a325 p.
901 _a108169
999 _c43632
_d43632