Apr 01, 2014 CEMAs first edition was originally published in 1966 with 331 pages. This newly released 7th edition has over 837 pages, includes basic data, fundamentals of design, belt conveyor capacities, belt selections, general applications, Ki and Ai factors and most important of all, Metric Conversion throughout the book. CEMA, Belt Conveyor for Bulk Materials, Fifth Edition, ISBN1-891171-18-6, USA. CEMA STANDARD NO. 502-1996, Bulk Material Belt Conveyor Troughing and Return Idlers, USA. ISO 251, Conveyor belts Widths and lengths, Second Edition, International Organization for Standardization.