In the UK between 1957 and 1964 Massey Ferguson manufactured some 380,000 MF35s, the most popular medium-sized farm tractors of the period. Many have remained in work and they are a restorer's favourite machine.   Chris Jaworski's book, based on his heavily illustrated articles for Tractor & Machinery magazine, is a step-by-step manual on servicing and repairing these machines.   This book goes back to the basics. The range and quality of his photographs are also far higher than those of the originals from sixty years ago.   The main headings of the book are: buying and safety; weekly checks; operator maintenance; engines; cooling systems; fuel systems; transmissions; rear axle and PTO; brakes; hydraulics; steering and front axle; electrics; bodywork.   For owners involved in servicing, repairs or restoration this crystal-clear guide will help them enjoy getting the work done efficiently.