000 00339nam a2200121Ia 4500
001 MPKV060462
008 120911s9999 xx 000 0 und d
082 _a631.4
245 _aSoil Science Vol.49 No.1-6
_c;
246 _aSoil Science Vol.49 No.1-6
260 _aMaryland
_bWilliams and Wilkins Co. Baltimore
_c1940
650 _aSoil Science
999 _c58449
_d58449