Data on the recorded occurrences over the period 1975-77 of members of the Bacillariophyceae, Dinophyceae, Silicoflagellatae and Cyanophyceae in the waters of the Great Barrier Reef: Williams WT (1982) Data on the recorded occurrences over the period 1975-77 of members of the Bacillariophyceae, Dinophyceae, Silicoflagellatae and Cyanophyceae in the waters of the Great Barrier Reef. AIMS-OS-82-3. Australian Institute of Marine Science. 60 p.