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.
Maruyama, Fudeko, "Preparing & Canning Jams & Jellies: Featuring New, Research-Based Recommendations for Safer and Better Quality Food at Home" (2000). Family and Consumer Sciences Publications. 83.