Previous ed. (B62-9797) 1962. Originally published as 'Leica und Leica System'. Frankfurt: Umschau Verlag Breidenstein, 1960.
The Leica, the Leicaflex, and their systems by Theo M. Scheerer. ISBN 0852421206. Published by Fountain in 1970. Publication and catalogue information, links to buy online and reader comments.