@misc{Schaeffer_Jakob_Christian_(1718-1790)_Die, author={Schaeffer, Jakob Christian (1718-1790)}, howpublished={online}, publisher={gedruckt bey Heinrich Gottfried Zunkel}, language={ger}, type={printed books 1501-1800}, title={Die beqveme und hochstvortheilhafte Waschmaschine}, keywords={technology, washing machines, printed books 1501-1800}, }