British King George V Definitive Profile Head and Seahorse StampsRobert C. Stein, Royal Philatelic Society (Great Britain) Staff · First published 2018Open the Tome
Power and persuasionP. C. M. Hoppenbrouwers, Janse, A., Stein, Robert · First published 2010Open the Tome
The aerogrammes of Australia and its dependencies, 1944-1980Robert C. Stein · First published 1984Open the Tome
