Genetics and Regulation of Nitrogen Fixation in Free-Living Bacteria

Nitrogen Fixation: Fundamentals and Applications: Proceedings of the 10th International Congress on Nitrogen Fixation, St. Petersburg, Russia, May 28—June 3, 1995

Biological Nitrogen Fixation: Towards Poverty Alleviation through Sustainable Agriculture: Proceedings of the 15th International Nitrogen Fixation Congress and the 12th International Conference of the African Association for Biological Nitrogen Fixation

New Horizons in Nitrogen Fixation: Proceedings of the 9th International Congress on Nitrogen Fixation, Cancún, Mexico, December 6–12, 1992

Biological Nitrogen Fixation for the 21st Century: Proceedings of the 11th International Congress on Nitrogen Fixation, Institut Pasteur, Paris, France, July 20–25 1997

Nitrogen Fixation: From Molecules to Crop Productivity: Proceedings of the 12th International Congress on Nitrogen Fixation, Foz do Iguaçu, Paraná, Brazil, September 12–17, 1999

Biological Nitrogen Fixation, Sustainable Agriculture and the Environment: Proceedings of the 14th International Nitrogen Fixation Congress