Vande Broek, A.KEIJERS, V.VANDERLEYDEN, J.2020-01-312020-01-3119960334-5114http://hdl.handle.net/10222/77496Effect of Oxygen on the Free-Living Nitrogen Fixation Activity and Expression of the Azospirillum brasilense NifH Gene in Various Plant-Associated DiazotrophsText21125