Ready Reference - Collins Pocket Reference

This fact finder is a revised version of the book "Gem Ready Reference", providing coverage of information on the world of measures including two new sections on symbols, codes and languages and abbreviations and words. Instant facts and figures, from laundry codes to Morse code, length, area, volume, weight, energy, temperature, time, speed, geometry, everyday measures, astronomy and features of the Earth are all included. The book also includes conversion tables.