Michigan has a book by the name of The Michigan Foundation Directory and you can check to see if your state has such a book that will list foundations within your state . The following three sources are books that will list organizations that may help give you information about whatever interest that you are working on. 061.3 Encyclopedia of Associations . This is a three volume set. Small Business Sourcebook .
Indexes are in the back of the books.
There are two places in the second volume that you may not want to overlook.