Arbeit, Leistung, Wirkungsgrad
By: von Alois Koller.
Series: Pu ; 34
Publisher: Siemens-Aktiengesellschaft
Published: 1974
Place of publication: Berlin; München
Language: ger
Number of pages: 64
Subjects: Work (Mechanics) -- Programmed instruction.; Mechanical efficiency -- Programmed instruction.
Notes: Cover title.