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040 _aMX-TxCIM
090 _aLook under author name
100 1 _aVasilas, B.L.
245 0 0 _aA tracer technique for the quantitative measurement of symbiotic dinitrogen fixation by soybeans in field studies
260 _aMinnesota (USA) :
_bUniversity of Minnesota,
_c1981
300 _avi, 80 pages
500 _aThesis (Ph. D.)
546 _aEnglish
593 _aLucia Segura
595 _aTC
942 _cTH
999 _c48961
_d48961