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- [8] ULTRASTRUCTURE OF HETEROCYST AND AKINETE OF BLUE-GREEN ALGAE ARCHIV FUR MIKROBIOLOGIE, 1963, 47 (01): : 19 - &
- [9] SPECIAL ASPECTS OF NITROGEN FIXATION BY BLUE-GREEN ALGAE PROCEEDINGS OF THE ROYAL SOCIETY SERIES B-BIOLOGICAL SCIENCES, 1969, 172 (1029): : 357 - +