Airmails

• The story of the England-India Air Mail by Harry Harper & Robert Brenard by the Times of India Annual 1936. 
• Abhishek Bhuwalka manages a very useful website on Philatelic Literature, including a section on India: Airmails and Maritime. This lists many publications on the subject.
• Indian Philately Digest has published International Postal Rates from India from 15 August 1947 to 1 April 1957. Very useful information to any Indian Airmails collector.
• Philatelic Bibliopole Catalog of Philatelic Books and Literature; New and Used​pbbooks.com/: Len Hartman is one of the most helpful dealers of Philatelic Books. He carries a vast inventory including several out of print editions. Here is a link to his website with an exhaustive listing of titles available with him. http://pbbooks.com/
• Collector Bazar online platform where you can buy and sell all kinds of collectible items like Stamps, Coins, Banknotes, Publications, Collectible and many more things. 

• An interesting episode about Zeppelins, and the philatelic aspect.​

• R101 - The Final Trials and Loss of the Ship: Over the summer of 1930, the R101 lay in the Number 1 shed at Cardington undergoing extensive modifications, which were needed following on from her 1929 and early 1930 trial flights.
• Control, Response and Crash of HMA R.101. Research paper published in the Journal of Aeronautical History by Bryan Lawton.

• Graf Zeppelin 1929 Around Globe Trip, Full Documentary.

• Flying to the Emirates: The end of British Overseas Airways Corporation’s service to Dubai and Sharjah in 1947" by Nicholas Stanley-Price, published in 2018 by Journal of Transport History.

• The Great Britain Philatelic Society has posted a superb reference set of English language versions of UPU Conventions and Related Documents, from the Berne Treaty of 1874 through to the Extraordinary Congress of 2019. 

• The Catapult Mail. During the late 1920s and early 1930s, the need for greater speed across Atlantic was recognized in the carriage of mail between Europe and the Americas. It is an interesting story of man's bringing together the knowledge learned from sailing the sea and flying in the air for the benefit of man's needs, as mail could be carried in the last leg by an airplane launched from a ship while still at sea. (Courtesy: Rainbow Stamp News, Monthly e-stamp magazine Dehradun, January 2021, Vol.XIII No.157)

• Flight of fancy. If anyone doubts India’s glorious aero history, this aerophilatelist’s unique collectibles of Indian airmails and Air India memorabilia, can prove otherwise. By Jane Borges, Mid-Day Mumbai, 30 May 2021

• The First Underpaid Letter to Travel by Air that too on the First Airmail Flight in History! - the only known cover by Piyush Khaitan (IP232 Vol.58.3 - 2024)