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
REMIAS, Daniel, Steffen JOST, Jens BOENIGK, Johann WASTIAN, & Cornelius LÜTZ
2013 (online, Jul. 10) Hydrurus-related golden algae (Chrysophyceae) cause yellow snow in polar summer snowfields
Phycol. Research
61(4): 277-285, 4 figs.