Resource libraries for animal welfare groups:
The Resource Library of No More Homeless Pets (NMHP) is an excellent resource on the Internet for animal rescue groups and shelters. They cover topics such as spay/neuter, fundraising, feral cats, adoptions amd more.
Don't miss the Humane Society's Resource Library which includes Animal Sheltering magazine articles, HSUS publications, training opportunities, policies, guidelines, advice, and other resources to help you in your work on behalf of animals.
And the incomparable Maddie's Fund Resource Library: