The Hungarian Hyperinflation of 1945-1946, The Postage Rates and Postal History of History’s Most Impressive Inflation by Robert B. Morgan, 2003, 266+16 pages, cloth bound, LC No. 2003-104997, ISBN 0-916675-14-9
An exceptional study of 27 rate changes over a two year period, excellent history and philately, well written. It covers all forms of postal service: Air Mail, Registered, Diplomatic Mail, Parcel Post, Express, Five-Word Greetings, Printed Matter, Matter for the Blind, Censored and many more.