Dipl. Eng. Denes Bernad was born in 1964 in Transylvania (Rumania), in a family of indigenous ethnic Hungarians. He studied at the Transylvanian University in Brasov, where he graduated in 1988 as a Mechanical Engineer. From 1992 he lived in Canada, and in 2006 he returned with his family to Hungary. Currently, he works in the automotive industry as Program Launch Manager. He is fluent in three languages. His main interest is the military history of Central and Eastern Europe, especially Rumania, Hungary and Bulgaria. His books deal especially with air forces and aircraft of these countries. He has written or co-authored seventeen historical books. Aside from the above books, Denes Bernad has published many studies concerning the history of aviation in Air Enthusiast, Air International and FlyPast (UK), WW1 Aero (USA), Avions (France), Repules, Aero Historia and A'j Szarnyak (Hungary), Militaria and Skrzydlata Polska (Poland) and Aeronatica, Aeromagazin and Model-Ist (Rumania). He is also the founding member of the Asociatia pentru Propagarea Istoriei Aviatiei (ARPIA) - Association for Propagation of History of Aviation (Bucharest, Rumania) and Magyar Repulestorteneti Tarsasag (MRT) - Hungarian Society of Aviation History (Budapest, Hungary). He is also a foreign correspondent of the French aviation magazine Avions. / Dipl. Eng. Charles K. Kliment was born in 1932 in Prague, Czechoslovakia. He studied polymer chemistry at the Technical University in Prague, and specialized in the research of hydrogels for medical, cosmetic and industrial uses. In 1969 he emigrated with his family to USA. He retired in 2001 and lives in Princeton, New Jersey. Already during the Second World War he began his interest in military history and combat weapons. During these years, he assembled a large collection of war-time photographs, documents and memoirs. He specializes in AFVs, especially in the history of tanks, developed in the pre-war Czechoslovakia and their use in Second World War. This was a topic of his first published book, Czechoslovak Armoured Vehicles 1918-1945, published by Bellona Press, UK (1978). Besides that, he has authored eight further books, translated two others, and published many articles in historical and modeling magazines, such as Military History, AFV News, Airfix Magazine. He also co-operates with various military museums and armored vehicles restorers.