The basic bible for preserving food is the current copy of Ball Blue Book Guide To Preserving (about $6). On the Internet its the "National Center for Home Food Preservation", both mentioned by others. The NCHFP is connected with the Univ. of Georgia and the USDA and considered 'the' authority on the subject.
The NCHFP has a great recipe book (about $18) and offers an online free course which I recommend everyone take. It will test your knowledge of preserving foods correctly.
__________________ Support bacteria. It's the only culture some people have.