The document provides instructions for parts books, including definitions of column headings in parts number pages such as reference number, part number, description, quantity, serial number range. It also notes country codes that may be included for parts that differ by country, such as parts working in all countries except France. The document then provides an index of parts for a tractor model broken down by system such as engine, fuel, electrical, transmission, hydraulics, with part numbers and references to parts books.