'ADVANCED PHILATELIC RESEARCH' BY PATRICK PEARSON. Fine hardback (1971,140 pages, several frontispage removed although text complete) written by ex president of the Royal Philatelic Society, looking at: Background to research, Plating, Printings and Colour, Cancellations, Postal Rates, Postal History, Other Fields, Selecting your subject and Sources. (Ref 101652).
