Relaxxd Fit Tactical thought it was prudent to give people as much information as they could carry comfortably. Introducing the Pocket Ref, explain how it is a general-purpose pocket-sized reference book composed of various tips, tables, maps, formulas, constants, and conversions, compiled by Thomas J. Glover.
The concise all-purpose pocket-sized reference book features 864 pages!
Always be prepared, you never know when the internet will go out.