The INA is a card file and online reporting system maintained at the Silva Center for Phycological Documentation of the University Herbarium, University of California, Berkeley. It contains nearly 200,000 names of algae (in the broad sense).
The BPU is a card file containing bibliographic references pertaining to algal taxonomy.
Bibliographia Phycologica Universalis
ROSS, Robert, & Patricia A. SIMS
1987 (Nov. 26)
Further genera of the Biddulphiaceae (diatoms) with interlocking spines
Bulletin of the British Museum (Natural History), Botany
16(4): 269-311, 13 pls. (=100 figs.)