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- [5] NITROGEN FIXATION BY UNICELLULAR BLUE-GREEN ALGAE ARCHIV FUR MIKROBIOLOGIE, 1971, 76 (04): : 341 - &
- [8] SPECIAL ASPECTS OF NITROGEN FIXATION BY BLUE-GREEN ALGAE PROCEEDINGS OF THE ROYAL SOCIETY SERIES B-BIOLOGICAL SCIENCES, 1969, 172 (1029): : 357 - +