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
KHURSEVICH, Galina K., & Sam L. VANLANDINGHAM
1993 (May)
Frustular morphology of some centric diatom species from Miocene freshwater sedimentary rocks of western U.S.A. and Canada
Nova Hedwigia
56(3/4): 389-400, 5 pls.