00635naa a2200217 a 450000100080000000500110000800800410001910000190006024501310007926000090021065000230021965000090024265000100025170000120026170000170027370000150029070000180030570000150032370000220033877300570036018322822012-07-27       1995    bl ---       0--  u    #d1 aLICHTFOUSE, E.  aUnexpected 13C-enrichment of organic components from wheat crop soilsbevidence for the in situ origin of soil organic matter.  c1995  aMatéria Orgânica  aSolo  aTrigo1 aDOU, S.1 aGIRARDIN, C.1 aGRABLY, M.1 aBALESDENT, J.1 aBÉHAR, F.1 aVANDENBROUCKE, M.  tOrganic Geochemistrygv. 23, n. 9, p. 865-868, 1995.