Sokkia Surveying Systems, Instruments, Equipment and Supplies •Total Stations •Electronic Field Book •Mapping Software •EDM Systems •Theodolites •Levels •Transits •Tripods •Rods •Hand Levels •Tapes •Planimeters •Accessories The paper in this book is a fine quality thick 50% rag ledger specially treated during the making to give "High Wet Strength." It retains is strength and writing surfaces when dried after having been subjected to extreme weather conditions.