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.