QUICKSTUDY REFERENCE GUIDES
https://www.barcharts.com/products/reference-study-guides/Absolutely no affiliation whatsoever.
I have bought some of these and put them in a 3-ring binder, along with other similarly condensed collections of knowledge, or infographs. It is like having a complete bookshelf in a binder. Can be very helpful for the prepper, homesteader, handyman or homeowner. Can help you in many ways from doing carpentry projects, to home-schooling.
All subjects are available, from first aid, nursing, psychology, trigonometry, geometry , weights and measures, you name it. Very valuable source of quick info at your finger tips.
Again, no affiliation. Just a satisfied customer.
and thought to share with you all.