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- advances in nitrogen fixation research : proceedings of the 5th international symposium on nitrogen fixation, noordwijkerhout, the netherlands, august 28 - september 3, 19832
- journal of agronomy & crop science2
- journal of hazardous materials2
- new phytologist2
- physiologia plantarum2
- plant & soil2
- plant production science2
- biological nitrogen fixation for the 21st century : proceedings of the 11th international congress on nitrogen fixation, institut pasteur, paris, france, july 20-25, 19971
- environmental & experimental botany1