@misc{Haret_Spiru_C._(1851–1912)_Mécanique_1910, author={Haret, Spiru C. (1851–1912)}, copyright={Public Domain}, address={Paris}, address={Bucarest}, howpublished={online}, year={1910}, publisher={Gauthier-Villars}, publisher={Ch. Göbl}, language={fre}, title={Mécanique sociale}, type={Text}, URL={http://rcin.org.pl/impan/Content/66534/PDF/WA35_11141_4661_Mecanique.pdf}, }