000 00292nam a2200121Ia 4500
008 140113s9999 xx 000 0 und d
082 _a631.416.1'4:581.001.5 K1
245 _aNitrogen - 15 in soil plant studies
260 _b"IAEA, 1971"
300 _a255p
650 _aSoils
942 _cBK
999 _c62599
_d62599