@misc{Mach_Ernst_(1838–1916)_Die_1896,
 author={Mach, Ernst (1838–1916)},
 copyright={Public Domain},
 address={Leipzig},
 howpublished={online},
 year={1896},
 publisher={Johann Ambrosius Barth},
 publisher={(C. Grumbach)},
 language={ger},
 language={ger},
 type={Text},
 title={Die Principien der Wärmelehre : historisch-kritish Entwickelt},
 URL={http://rcin.org.pl/impan/Content/19411/PDF/WA35_3912_5312_Die-Principien.pdf},
}