Leo & Co: Der 80. Geburtstag
Theo Scherling & Elke Burger
Scope Guide 3rd Ed.
BK Precision
Lessons In Electric Circuits, Vol. II, AC, 6th Edition
Tony R. Kuphaldt
Design Basic of Industrial Gear Boxes
Andrzej Maciejczyk & Zbigniew Zdziennicki
501 German Verbs
Henry Strutz
501 Verb Series (1)