1
by Helvétius
Published 1768
Chez Durand

2
by Helvétius
Published 1777
[s.n.]

3
by Helvétius
Published 1791

4
by Helvétius
Published 1777

5
by Helvétius
Published 1758
Chez Durand

6
by Helvétius
Published 1759
[Printed for the translator, and sold by Mr. Dodsley and Co. [and 8 others]

7
by Helvétius
Published 1769
Chez Durand