This is THE pdf you want if you are building first-aid kits.
This 28 page pdf is an extensive list of the equipment, medications, and supplies needed to build any size kit, as well as the uses for each item on the list.
With the list you can create large kits to serve a group, church, or family, or you can create personalized individual kits for the bug-out-bag, get-home-bag, or every day carry bag.