@misc{Clavel_Adolphe_(1815-1881)_Les_1877,
 author={Clavel, Adolphe (1815-1881)},
 title={Les principes au XIXe siècle},
 address={Paris},
 year={1877},
 language={fre},
 type={książka},
 publisher={Librairie Gremer-Baillière},
}