Journals with Crustacea content
The Journal of Crustacean Biology (See also BioOne.org for electronic access)
There are several other journals that publish papers on Crustacea, including parasitological, physiological, immunologicial and other topics.
See also Newsletters with Crustacea content above.
Crustacean Monographs series
Treatise on Zoology: The Crustacea
Other Societies for Crustacea
General Crustacea information (in no particular order)
(NB: several of these links may be defunct....)
Keys to crustacean groups
If your site has scientific content on Crustacea, and you'd like to see it here, contact email@example.com. I can be a little slow in adding links, so please be patient.
There are other resources for Crustacea. Try using your search term on http://www.google.com. I've found many papers, people, and information this way.