This guide, containing up-to-date instructions for preparing safe home-canned foods, is based on research conducted at the Pennsylvania State University. It is adapted from the USDA Complete Guide to Home Canning.
Burrier, Sue, "Selecting, Preparing & Canning Tomatoes & Tomato Products: Featuring New, Research-Based Recommendations for Safer and Better Quality Food at Home" (2000). Family and Consumer Sciences Publications. 79.