CPU 8048
( German, published in 1982
by Elektor )

Z80 Applications
( published in 1983 by SYBEX )

Z-80 Introduction and Programming
( German, published in 1979 by Elektor )

Programming the Z80
( German, published in 1982
by SYBEX )

Basic Interpreter for the 8080 / Z80
( German, published in 1982
by Franzis )

Home Computer Catalog
( German, published in 1983
by Chip / Ravensburger )

CP/M
( German, published in 1985 by IWT )

CP/M Manual
( German, published by
Dipl.-Phys. A. Maass / Eppendorf )

Programming Manual for Sharp's
( German, published in 198?
by Hofacker )

Introduction to computers
( German, published by Heyne )

Japanese Program Book MZ-700