Interest Group Research Materials

General Research:
The sites below are excellent resources for general research about interest groups:

Open Secrets
Project Vote Smart
Wikipedia

Going Further:
The best way to get more specific research about an interest group or a piece of specific information about a group (like membership of the National Beer Wholesalers Association) is to do a google search with the following terms:

• interest group name + question/topic
• For example, a google search with for "who are the members of the National Beer Wholesalers Association" will send you to a great resource here: National Beer Wholesalers Association Membership