Introduction to the Oomycota
- Overview of the water molds and downy mildews with links and images.
- http://www.ucmp.berkeley.edu/chromista/oomycota.html

Simple Fungi - Phyla Chytridiomycota and Oomycota
- Illustrated outline of the classification and economic significance of the Chytridiomycota and Oomycota.
- http://www.mycolog.com/chapter2b.htm