00412naa a2200133 a 450000100080000000500110000800800410001910000190006024500870007926000090016665000180017565300260019377300590021916038851995-06-27       1982    bl ---       0--  u    #d1 aZUBERER, D. A.  aNitrogen fixation (acetylene reduction) associated with duckweed (Lemmaceae) mats.  c1982  aCyanobacteria  aASSOCIACAO COM PLANTA  tAppl. Environ. Microbiol.gv.43, n.4, p.823-828, 1982.